ESE ES-185U User manual

142 SIERRA ST., EL SEGUNDO, CA 90245 USA [phone] FAX [phone] www.ESE-WEB.com
ES-185U
GPS Master Clock
Operation and Maintenance Manual

TABLE OF CONTENTS
1.0 INTRODUCTION ....................................................................................................................................1
2.0 INSTALLATION & OPERATION .............................................................................................................1
3.0 ENCLOSURE .........................................................................................................................................1
4.0 STANDARD FEATURES ........................................................................................................................2
4.1 Display................................................................................................................................................2
4.2 Outputs ...............................................................................................................................................2
5.0 SETUP FEATURES................................................................................................................................3
5.1 Software Installation............................................................................................................................3
5.2 USB Driver Installation ........................................................................................................................3
5.3 Master Control Panel Software............................................................................................................3
5.4 Option NTP Setup...............................................................................................................................4
5.4.1 DHCP Setup (factory default)...........................................................................................................5
5.4.2 Fixed IP Address Setup ...................................................................................................................5
5.4.3 Permanent IP Address Assignment..................................................................................................5
5.4.3.1 Master Control Panel Software ..................................................................................................5
5.4.3.2 Web Interface............................................................................................................................6
5.4.3.3 Telnet Session...........................................................................................................................6
6.0 ANTENNA ..............................................................................................................................................6
7.0 BATTERIES............................................................................................................................................6
8.0 OPTIONS ...............................................................................................................................................7
9.0 SPECIFICATIONS..................................................................................................................................8
9.1 General...............................................................................................................................................8
9.2 Rear Panel Connector Pin Designations..............................................................................................9
10.0 ANTENNA MOUNTING INSTRUCTIONS .............................................................................................10
11.0 ANTENNA CABLE TESTS & ALTERNATIVES .....................................................................................11
11.1 Method 1 (low loss cable)..................................................................................................................11
11.2 Method 2 (in-line amplifier) ................................................................................................................11
11.3 Method 3 (in-line amplifiers with power divider)..................................................................................11
12.0 ESE TEST RESULTS...........................................................................................................................12
12.1 Test 1................................................................................................................................................12
12.2 Test 2................................................................................................................................................12
12.3 Test 3................................................................................................................................................12
12.4 Test 4................................................................................................................................................12
13.0 APPLICATION NOTES.........................................................................................................................13
13.1 Application Note 1.............................................................................................................................13
13.2 Application Note 2.............................................................................................................................13
13.3 Application Note 3.............................................................................................................................13
14.0 FRONT AND REAR VIEWS..................................................................................................................14
15.0 PARTS LIST.........................................................................................................................................15
15.1 Option K............................................................................................................................................18
16.0 LAYOUTS.............................................................................................................................................19
16.1 Option K............................................................................................................................................20
17.0 SCHEMATICS......................................................................................................................................21
17.1 Logic Sheet 1....................................................................................................................................21
17.2 Logic Sheet 2....................................................................................................................................22
17.3 Display..............................................................................................................................................23
17.4 Option K............................................................................................................................................24
18.0 WARRANTY.........................................................................................................................................25

Page 1
1.0 INTRODUCTION
The ES-185U is a GPS Master Clock/Time Code Generator. The unit receives accurate time and date information
from Global Positioning System satellites and supplies this data to the user in the form of five (5) different types of
time code (SMPTE/EBU, IRIG-B, ASCII, TC89 and TC90) and a front panel nine-digit display (.56” yellow LEDs).
Two (2) One Pulse Per Second outputs and a GPS “Lock” output are also available. A twelve-channel receiver is
employed that is capable of tracking up to twelve (12) satellites simultaneously, although reception of only one is
required for GPS “Lock”. During normal operation, the GPS “Lock” LED lights when GPS “Lock” is obtained and
goes out when GPS “Lock” is lost. Also, the TTL GPS “Lock” output goes high when GPS “Lock” is obtained and
goes low when GPS “Lock” is lost. If GPS “Lock” is lost, accurate outputs are maintained using internal
temperature compensated crystal oscillators. The Master Control Panel software provided with the unit allows the
user to easily change settings of the ES-185U via a serial port or USB interface. A network interface is provided
with option NTP.
An internal 3V coin cell battery maintains the GPS receiver board memory. If this battery is replaced with a new
coin cell or the coin cell is dead, this will affect how the ES-185U obtains GPS lock from a cold start (i.e. main
power is removed from the unit and the battery backup is off). In this situation, the GPS “Lock” LED will flash until
initial GPS “Lock” is achieved. It will continue to flash for 13 minutes. This timeout period allows the GPS receiver
to acquire the proper data relative to GPS/UTC mode and a satellite almanac. While the GPS “Lock” LED is
flashing, the TTL GPS “Lock” output will alternate between high and low. After the timeout period, during which
the GPS receiver has tracked at least one satellite continuously, the GPS “Lock” LED lights solid to indicate that
the display and outputs have the correct UTC time. The TTL GPS “Lock” output also goes high after the timeout
period has completed.
Several options are available that allow the unit to meet most any requirement of a Master Clock or Time Code
Generator. These options are described in section 8.
IMPORTANT NOTE:
The Antenna Module supplied with the ES-185U is designed for "direct mounting". This implies that the antenna
should be mounted to a "deck plane", which may be a wall, a roof or any other "suitable" surface.
The dome of the Antenna Module is designed for mounting outside (or inside near a window with a view of the
sky) and is capable of withstanding most weather conditions (including sun, wind, rain and snow, etc.). The cable,
however, should be routed so as to minimize its exposure to the elements, especially moisture and direct sun.
In order to prevent moisture from seeping back into the Antenna Module, it is important that the cable "hangs
down" as it exits the Antenna Module. Also, a drip loop should be made between the Antenna Module and the
ES-185U. Improper cable routing may allow moisture to enter the Antenna Module or the ES-185U and
permanently damage the antenna and/or the clock, voiding that portion of the warranty. A recommended
Installation Procedure is provided in section 10.
2.0 INSTALLATION & OPERATION
The basic operation of the ES-185U is nearly as simple as connecting the antenna cable to the clock, applying
power (typically 117 VAC) and allowing the unit to "lock" onto GPS. However, after any "bench" testing is
complete, the most important concern is to mount the Antenna Module and route the cable according to the
instructions provided in section 10.
All other connections between the ES-185U and other equipment should be made by a qualified technician or
engineer. The technician or engineer should be familiar with each piece of equipment being interfaced with the
ES-185U. Please refer to the descriptions and specifications which follow for details concerning the various
Standard Features and Options. Consult the manufacturer of the equipment or the ESE factory if assistance is
required.
3.0 ENCLOSURE
The ES-185U is housed in a 1RU rack-mount enclosure which measures 1 ¾” high x 19" wide x 9 ½” deep (plus
connectors). The ruggedized enclosure is constructed of etched and anodized aluminum. The front panel is black
anodized and the rest of the enclosure is clear anodized. A clear anodized front-panel can optionally be specified.

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4.0 STANDARD FEATURES
4.1 Display
The front-panel display consists of nine .56" high yellow LEDs that display Days, Hours, Minutes and
Seconds. The display may be set to 12 hour or 24 hour format by using the Master Control Panel
software.
A single green LED indicates if the unit is "Locked" to GPS. Access to a TTL output of GPS "Lock"
information is accessible on the DB-9 connector.
4.2 Outputs
The rear-panel of the ES-185U provides access to all outputs via various connectors (XLR, BNC & DB-9).
Please refer to section 9 for more details.
ESE Time Code: The most efficient and cost-effective method for time code distribution in a Master
Clock/Remote Clock System employs the ESE Time Code output. ESE Time Code is
capable of driving up to 100 remote displays at a distance of up to 4000 feet. Connections
(between the ES-185U ESE Time Code Output and any ESE Time Code Reader) can be
made using twisted pair wire or coax cable such as RG-58 or RG-59. The accuracy is 17mS
of UTC and the time code is accessible on two separate BNC connectors (TC89 & TC90).
TC89 is an older version of ESE Time Code and should be used to drive older ESE Time
Code Readers (non-”A” versions). TC90 contains “Date” information as well as time data
and should be used if “Date” is to be displayed on the Reader.
1 PPS: The most accurate time information available from the ES-185U is that provided by the 1
PPS Output (one pulse per second). Two (2) outputs are provided: a 20% duty signal
specified as being within 10 ηS of UTC, and a 50% duty signal which is within 1 mS of UTC.
The 20% duty signal is obtained directly from the receiver. The 50% duty signal is
regenerated by the timekeeping microprocessor; this signal is isolated from dropouts due to
signal loss and should be used for long-term timekeeping purposes. Both signals are
positive edge true. The 1 PPS can be used for synchronization purposes in a variety of
applications. One such application allows the 1 PPS to drive an Impulse Driver (ES-165 or
ES-162A) which, in turn, can drive "Analog" Impulse Clocks (ES-168 or ES-162S and
Favags).
SMPTE Time Code: A SMPTE Time Code Output is accessible via an XLR connector. The SMPTE Output is
automatically “resynced” to GPS after a specified number of frames, at a specified time or
both. The SMPTE Output can also be synchronized to a video source via the "Video In"
BNC connector. SMPTE (Society of Motion Picture and Television Engineers) is used
predominantly in the TV, Cable and Video industries. The unit may be set to EBU/PAL (the
European equivalent to SMPTE/NTSC) if desired. The SMPTE Date Format may be set to
one of four formats: Format L, Format E, Format S or DOY. Refer to section 5.3 for more
information about setting up the SMPTE Output.
IRIG-B Time Code: An IRIG-B Output (AM or TTL) is accessible on a BNC connector. The IRIG-B output is
accurate to 1 µS of UTC. An internal slide switch allows the user to set the output to AM or
TTL. IRIG-B (Inter Range Instrumentation Group) is needed most frequently for military
applications.
RS-232C: RS-232C ASCII Time Code is used to interface with a PC or other computer system. The
ASCII transmission contains date and time data and is transmitted once per second. The
data is accessible on the DB-9 connector.
USB: The ES-185U provides a USB 2.0 compatible USB port. ASCII Time Code is output on the
USB port. ASCII Time Code is used to interface with a PC or other computer system. The
ASCII transmission contains date and time data and is transmitted once per second. Refer
to section 9.0 for a description of the output format.
The USB port of the ES-185U acts as a virtual COM port when used to connect the
ES-185U to a computer. Refer to the computer’s Device Manager to determine the COM
port assigned to the ES-185U. Refer to section 5.0 for more information on installing the
USB driver.
The USB port is powered by the ES-185U. The maximum cable length is 5 meters. A 1.8
meter cable is provided with the unit.

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5.0 SETUP FEATURES
All of the settings of the ES-185U are set and changed with the ESE Master Control Panel software. A Windows
based computer with a serial port or a USB port is required. The Master Control Panel software is compatible with
Windows 98, Windows NT, Windows ME, Windows 2000and Windows XP. Several features of the
ES-185U are factory set according to information supplied by the end user or according to factory standards.
5.1 Software Installation
The ESE Master Control Panel software is included on the CD supplied with the ES-185U. The software
is located in the Master Control Panel directory. If necessary, a self-extracting zip file (Master Control
Panel.exe) may be downloaded from the ESE web site http://www.ese-web.com.
If installing the software from the CD, double click on the setup.exe file located in the Software directory
of the Master Control Panel directory. If installing software using the self-extracting zip file from the web
site, double click on the Master Control Panel.exe file. This extracts the setup files. Next, double click on
the setup.exe file in the Software directory that is located in the directory where the files were extracted.
The installation process creates a Master Control program group where the ESE Master Control Panel
software may be started. The end user may create a desktop icon if desired.
5.2 USB Driver Installation
The user may use either a serial port or a USB port to interface with the Master Control Panel software. If
using a USB port, follow the instructions for installing the USB driver in this section. If using a serial port,
installation of the USB driver is not necessary.
If the ES-185U is not powered up at this point, supply power to the unit. The antenna and any other
equipment may be connected to the ES-185U at this point. Connect the USB cable that was supplied with
the unit to the ES-185U. Next, connect the cable to the computer.
The Add New Hardware Wizard should automatically detect the USB port of the ES-185U. Some versions
of Windows(XP) automatically install the correct driver for the USB port. Some versions, however, do
not. If this is the case, the driver is supplied with the Master Control Panel software.
The Add New Hardware Wizard opens a dialog box stating that it will search for new drivers. Click Next.
Select “Search for the best driver for your device. (Recommended)”. Click Next. Select “Specify a
location” and click Browse to select the USB Driver directory. This directory is located in the Master
Control Panel directory on the CD. If the software was downloaded and self extracted, the USB Driver
directory is located in the directory where the files were unzipped. Click Next. The Add New Hardware
Wizard should find a file called FTDIBUS.II. Click Next. The USB Serial Converter software should be
installed. Click Finish to complete the installation.
The next step is to reboot the computer. A message box may appear stating that new hardware has been
found. Click Browse and go to the USB Driver directory again. The file ftdiport.cat is located here. Click
OK. The driver should be completely installed now.
5.3 Master Control Panel Software
If the ES-185U is not already connected to a serial port or USB port on the computer, connect the
ES-185U to one of those ports. Start the Master Control Panel software. The software should
automatically detect the ES-185U. If not, click on the Connections Menu Item at the top of the window. A
Connection Search window appears. If the ES-185U is not listed in the window, click on Search. The
software should find the ES-185U. Check the box next to the Comport and click Connect. If using the
USB port and the software does not find the ES-185U, open the Device Manager and look for a USB
Serial Port. If you cannot find a USB Serial Port, try reinstalling the driver.
The Master Control Panel is divided into two sections: PC Time Setting via RS-232/USB and Clock
Settings. The Computer Time and Master Clock Time are displayed in the PC Time Setting section.
Check the Update PC Clock box in order to update the PC clock. Uncheck the Update PC Clock box to
have the PC clock free run.
The Clock Settings section contains four tabs and two buttons. The tabs are Primary Settings, SMPTE
Settings, Relay Events and DST Settings. The buttons are Send Settings and Set to Defaults. Each are
described here.
The Primary Settings tab allows the user to set the time and date of the ES-185U (when it is not locked to
GPS), the time zone offset, the TC89 Hour Format, the Display Format, the Second Offset and the
Millisecond Offset. If the ES-185U is not locked to GPS, the user may set the time and date of the
ES-185U. Set the time and date and click the Update Now box. The Update Now box only sets the time

Page 4
and date of the ES-185U. It does not update any other settings. The user should select the desired
timezone from the Timezone drop down box. Timezone offsets are available in ½ our increments up to +/-
12 hours. If the TC89 output is used, the user may select 12 Hour or 24 Hour format. The display can be
set to 12 Hour or 24 Hour format. If an offset in seconds or milliseconds is desired, select the
corresponding offsets from the Second Offset and Millisecond Offset drop down boxes. The seconds
offset is up to +/- 2 seconds and the milliseconds offset is up to +/- 490 milliseconds. Click on Send
Settings to update the ES-185U if any settings were changed.
The SMPTE Settings tab allows the user to set the Mode, Date Format and Resync settings of the
SMPTE output. The Mode drop down box allows the user to select Drop Frame, Non Drop Frame, EBU
or Real Time modes. The Date Format drop down box allows the user to select the format of the user
bits. The available formats are Format L (Leitch Format), Format E (ESE Format M-D-Y), Format S
(SMPTE 309M), or DOY (1-366). The Resync SMPTE after a drift of: drop down box allows the user to
select the number of frames that the SMPTE output is allowed to drift before the SMPTE output is
resynced to GPS. The user may select 3, 4, 5, 6, 7, 8, 10 or 12 frames. If the user would like to have the
SMPTE output resynced to GPS at a specific time, the Enable SMPTE Resync at: box should be checked
and the appropriate time should be entered. The Resync SMPTE Now button resyncs the SMPTE output
to GPS when the button is clicked. If any settings were changed, click the Send Settings button to update
the ES-185U.
The Relay Events tab allows the user to program up to four relay closures. Option HR is required in order
to have a relay closure occur. Each event may be enabled or disabled by checking or unchecking the
Enabled box corresponding to each event. The user may program each event using the Min:Sec boxes
corresponding to each event. The events occur every hour since only minutes and seconds may be
programmed. Click the Send Settings box to update the ES-185U if any changes have been made.
The DST Settings Tab allows the user to set up the DST feature. Check the Auto DST box in order have
the ES-185U automatically compensate for changes into and out of Daylight Savings Time. The DST
adjustment is according to the standards used in the United States and switches at 2:00 AM. The Default
Dates account for the changes to the DST dates that will take place in 2007. The user may use the
Default Dates or the Custom Dates. To change the Custom Dates, click the Edit Custom Dates button.
The Send Settings box allows the user to update the ES-185U as has already been described. The user
does not need to click Send Settings after making changes in each tab. The Send Settings box may be
clicked after settings have been changed in all three tabs. The Set to Defaults box allows the user to
reset the settings of the Master Control Panel software and the ES-185U to the factory defaults.
Clicking on the Help Menu Item at the top of the Master Control Panel windows displays a help file for the
Master Control Panel software. The Hide link near the top of the window minimizes the Master Control
Panel window to an icon in the system tray. Click on the icon to restore the Master Control Panel window.
5.4 Option NTP Setup
Option NTP allows the ES-185U to act as a network time server. The Master Control Panel software, a
web page interface or a telnet session may be used to set up the ES-185U when option NTP is ordered.
When option NTP is ordered, the ES-185U needs to be assigned a permanent IP address. This can be
done using DHCP (Dynamic Host Configuration Protocol) or by using a fixed IP address. Both methods
are described in this section. Only one method needs to be used to assign the ES-185U an IP address.
Before powering up the ES-185U, connect the unit to the network and connect the antenna to the TNC
connector on the back of the unit.
When the ES-185U is shipped from the factory, the unit is already set up for DHCP Setup mode. If the
network has a DHCP server, a dynamic IP address will automatically be assigned to the ES-185U when
the ES-185U is first powered up (the ES-185U should be connected to the network before the initial
power up). Check the DHCP table in order to determine what IP address the ES-185U was assigned. If
you are unsure about how to check the DHCP table, refer to the documentation of the network router or
talk to your network administrator. The next step is to assign a permanent IP address to the ES-185U by
following the steps in the Permanent IP Address Assignment section (5.4.3).
If the unit is powered down in the future and powered back up, the ES-185U remembers the permanent
IP address it was assigned. The only time a new IP address is assigned is when the Reset button is
pressed for more than four seconds, thus initiating either the DHCP Setup or the Fixed IP Address Setup
procedures as described in the following sections.
If your network does not have a DHCP server, refer to the Fixed IP Address Setup section (5.4.2).

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5.4.1 DHCP Setup (factory default)
This method of setting the IP address of the ES-185U can be used if the network has a DHCP
server. Using this method automatically assigns an IP address to the ES-185U.
When the ES-185U is shipped from the factory, the unit is already set up for DHCP Setup
mode. Connect the ES-185U to the network and then power up the unit. The DHCP server
should then assign the unit a dynamic local IP address. Check the DHCP table in order to
determine what IP address the ES-185U was assigned. If you are unsure about how to check
the DHCP table, refer to the documentation of the network router or talk to your network
administrator. The last step is to assign a permanent IP address to the ES-185U by following
the steps under Permanent IP Address Assignment.
If the DHCP server did not detect the ES-185U, follow the procedure described here to set the
ES-185U in DHCP Setup mode and try again. The ES-185U should be connected to the
network during this process. Unplug the ES-185U for 10 seconds and power up to restore
normal operation. Then hold the Reset button (accessible from the rear panel) down until the
GPS Lock LED goes out (it will have been either lit or flashing, depending upon lock status).
This takes about 4 seconds. Then immediately release the button. If configuration is
successful, the GPS Lock led will begin flashing rapidly within a few seconds. Unplug the unit
for 10 seconds, then power up to restore normal operation. The DHCP server should then
assign the unit a dynamic local IP address. Check the DHCP table in order to determine what
IP address the ES-185U was assigned. If you are unsure about how to check the DHCP table,
refer to the documentation of the network router or talk to your network administrator. The last
step is to assign a permanent IP address to the ES-185U by following the steps under
Permanent IP Address Assignment (5.4.3).
5.4.2 Fixed IP Address Setup
If you don’t have a DHCP server LAN, you can configure the unit with a fixed IP address. The
unit will be set to a factory default address (192.168.1.50), which can be changed later
through a telnet session as described below. To start the fixed IP address setup, unplug the
ES-185U for 10 seconds and power up to restore normal operation. Next, hold down the
Reset button until the GPS Lock LED goes out (4 seconds) and then re-lights solid (another
2.5 seconds). Release the button. If configuration is successful, the GPS Lock LED will begin
flashing rapidly within a few seconds. Unplug the unit for 10 seconds, then power up to restore
normal operation. To change the IP address to its final value, follow the instructions described
here.
The NTP Port has been assigned a default IP Address of "192.168.1.50". In order to connect
to the device using telnet, you must set the IP address of the computer you use to connect to
the device to a value within the same subnet of the default NTP port address. (Please consult
with your network administrator if help is needed.)
Example: If you presently have a subnet mask of "255.255.255.0", then any IP Address
between the range 192.168.1.1 - 192.168.1.254 will work, excluding 192.168.1.50 which is the
default for the NTP port.
Next, follow the Permanent IP Address Assignment procedure (5.4.3). If the IP address of the
computer was changed in order to connect to the ES-185U, remember to change it back to the
original IP address after the IP address of the ES-185U has been changed.
5.4.3 Permanent IP Address Assignment
The Master Control Panel software, a web page interface or a telnet session may be used to
set up the permanent IP address of the ES-185U. Only one method is required. The user may
select the easiest method to do this.
5.4.3.1 Master Control Panel Software
Start the Master Control Panel software. If it has not been installed yet, see section
5.1 for instructions on how to install the software. When the Master Control Panel
software connects to the ES-185U through a network connection, additional tabs
appear in the Master Control Panel window. The additional tabs are NTP Settings,
Broadcast Settings and Password. The Primary Settings, SMPTE Settings and Relay
Events tabs are the same as described in section 5.3. The PC Time Setting via RS-
232/USB section is not displayed when the Master Control Panel is connected to the

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ES-185U through a network connection. It is replaced with a picture of the ES-185U.
The three additional tabs are described here.
The NTP Settings tab allows the user to assign a permanent IP address for the
ES-185U and set up other network settings of the ES-185U. The user may enter the
server IP address, the server port, the subnet mask, the gateway address and the
DNS server. Typically, the server port is 123 for NTP broadcasting. Click on Send
Settings to update the ES-185U if any settings were changed.
The Broadcast Settings tab allows the user to specify when a broadcast is made. The
user may also enter up to three broadcast addresses. A time in minutes (1 – 500)
should be entered into the Send Broadcast every X minute(s) box. Three broadcast
addresses may be entered as well. Enable individual addresses by checking the
corresponding Enable box. Disable individual addresses by unchecking the
corresponding Enable box. Click on Send Settings to update the ES-185U if any
settings were changed.
The Password tab allows the user to enter a password up to four characters in length.
Check the Enable Telnet/Network Password box to enable the password. Enter the
password in the Password box and re-enter the password in the Re-enter Password
box. Click on Send Settings to update the ES-185U if any settings were changed.
5.4.3.2 Web Interface
The settings of the ES-185U may also be set up through a web page interface. The
Master Control Panel software is not required if using the web page interface. A Java
enabled browser with the Java Runtime Environment installed is all that is required.
Access the web page interface by pointing your favorite browser to the IP address of
the ES-185U. If an IP address has not been assigned to the unit, refer to section 5.4
for information on how to initially assign an IP address to the ES-185U. All of the
features of the Master Control Panel described in sections 5.3 and 5.4.3.1 are
accessible through the web page interface.
5.4.3.3 Telnet Session
The settings of the ES-185U may also be set up through a telnet session. The Master
Control Panel software is not required if using a telnet session.
Follow the instruction described here to connect to the ES-185U through a telnet
session.
Type “telnet [ES-185U IP address] 9999” and press enter to go into the setup mode.
The notation [ES-185U IP address] should be replaced with the actual IP address that
the ES-185U was assigned through either the DCHP Setup or the Fixed IP Address
Setup.
All of the features of the Master Control Panel described in sections 5.3 and 5.4.3.1
are accessible through a telnet session. Follow the prompts to set up the ES-185U as
desired.
6.0 ANTENNA
An "active" GPS Antenna (1.575 GHz) with 16’ 5” cable is supplied with the ES-185U. ESE has conducted a
series of tests with the purpose of determining a maximum cable length (with or without amplification). A summary
of the tests and the alternatives are discussed in section 11. Proper installation of the Antenna Module is
imperative for proper operation and continued life of the antenna and clock. See section 10.
7.0 BATTERIES
The ES-185U is supplied with a built-in Battery Back-Up/Charger System. The battery is capable of maintaining
the ESE (TC89 and TC90), 1 PPS and ASCII outputs during a power outage for up to 4 hours. The SMPTE and
IRIG-B outputs are not maintained during power outages. The display is disabled during power outages. If
continuous displays during power outages are required, a UPS (Uninterruptible Power Supply) is suggested.
Note: Turn off the battery during shipment or any extended periods of time without main power.
An internal 3-volt lithium coin cell battery maintains user settings during periods without power. The battery is
capable of maintaining the settings for up to four years. If replacement of this battery is required, it is easily
removed from the printed circuit board mounted coin cell holder.

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8.0 OPTIONS
The rear-panel of the ES-185U provides access to all "Optional" inputs and outputs via various connectors (BNC
and DB-9). Please refer to section 9 for more details.
ANT: A high performance antenna for challenging EMI environments is provided with this option. Nineteen
feet of cable is supplied with the antenna. An N-Connector (jack style) is supplied on the antenna. The
cable is supplied with a mating N-Connector and a TNC to connect to the ES-185U.
Clear: When this option is specified, the ES-185U is supplied with a clear anodized front panel.
DC: The ES-185U can be ordered from the factory to operate exclusively from a DC source. Two versions
of this option are available, 12 VDC and 28 VDC. The range for the 12 VDC is +10 VDC to +16 VDC
and the range of the 28 VDC is +20 to +34 VDC. The DC voltage applied to the unit is via the Locking
DC Power Plug. Note: When the DC Option is specified, the unit is NOT operable from AC. Also, at
time of order, either 12 or 28 must be specified.
HR: Option "HR" provides a user programmable relay contact closure. Refer to section 5.3 for information
on setting the times of up to four programmable relay closures. The reed relay is rated at 10 watts
maximum resistive load (500 mA switching current) and is intended for control applications only. The
relay contacts are accessible on the DB-9 connector (see section 9 for pin designations).
J: The standard ES-185U is intended to operate from 117 VAC 50/60 Hz. If 220 VAC operation is
required, Option "J" must be specified.
K: Option "K" provides a 1 KHz square wave, a 10 MHz sine wave and a phase coherent 1 PPS output.
The 1 PPS output has a 50% duty cycle and replaces the standard 50% duty cycle 1 PPS output. The
1 KHz and 10 MHz outputs are accessible on BNC connectors. The 10 MHz sine wave is 4 Vpp into
50 ohms. Potentiometer R6 allows the output level of the sine wave to be adjusted by +/- 0.5 volts.
The 1 KHz square wave is 5 Vpp. A front panel 10 MHz Lock LED is provided. This LED lights solid to
indicate that the unit has “locked” to GPS and the outputs are within specifications. The 1 PPS output
is phase coherent when the 10 MHz Lock LED lights solid. The LED blinks if GPS “lock” has been
obtained, but the outputs are out of specifications. If “lock” has not been obtained, the LED does not
light.
The Option “K” system functions independently from the rest of the clock, although it receives its input
from the same GPS receiver as the clock system. When first powered up, the receiver searches for
satellites. When it locks on to at least one, the GPS Lock LED indicates a locked condition by lighting
solidly. The 10 MHz Lock LED begins flashing after a delay of about 40 seconds. The flashing of this
LED indicates that the GPS receiver is locked and that the 10 MHz system is in the process of
adjusting the frequency of the 10 MHz output. This process may take up to 1 hour. During this time the
frequency, if measured, may indicate 100 – 200 Hz off. This is normal during the locking process.
While the 10 MHz Lock LED is flashing, the output should not be used as a reference. When this LED
lights solidly, the output is within tolerance.
The ES-110M12 PCB generates the Option “K” outputs – 10 MHz & 1 KHz. The PCB receives 1 Hz
and satellite data from the GPS receiver on the main PCB. +12v & +5v power is also supplied to the
110M12 board. The system consists of a TCXO (temperature-compensated crystal oscillator), counter
chain, phase detector, loop filter and supervisory microcontroller (Z2). The 20 MHz oscillator is divided
by the counter chain (Z7-Z12 & part of Z5) down to 1 Hz. The phase-detector chip (Z4) receives this
signal and the 1 Hz signal from the GPS receiver. Z4 produces an output which is fed to the loop filter,
consisting of analog switch Z3, resistors R15 - R17, capacitors C22 - C23 and op-amp Z17. The
analog switch allows the microcontroller to control the time constant of the filter and also disable the
loop during periods of non-reception of satellites. The filtered control voltage is fed to the frequency
control input of the TCXO. This functions as a phase locked loop, controlling the frequency and phase
of the oscillator from the GPS reference 1 Hz. The satellite data from the GPS is fed to the
microcontroller UART input, allowing the system to know if the receiver is locked to satellites. The
microcontroller also monitors an output from the phase detector chip to determine the amount of
phase difference between the GPS and the internally divided 1Hz. If it is greater than approximately 40
milliseconds, the microcontroller “gear shifts” the counter chain fast or slow to bring the relative phase
to under 40 mS. This procedure is performed during initial lock-on, or if reception of satellites is lost for
a significant time and enough drift occurs. After rough phase adjustment is performed, the oscillator
frequency remains either fast or slow by about 100-200 Hz until the local 1 Hz arrives in phase with
the GPS 1 Hz. This typically takes up to 1 hour. During this time, the 10 MHz Lock LED flashes. The
frequency then stabilizes at the center frequency of 20 MHz (it is divided by 2 for the output). After

Page 8
stabilization, the 10 MHz Lock LED lights solidly. The 10 MHz output is filtered to a sine-wave and
buffered by op-amp Z14. The microcontroller generates the 1 KHz signal, which is buffered by Z1.
NTP: When Option “NTP” is specified, a NTP port is supplied with the unit that allows the ES-185U to act as
a network time server. The settings of the ES-185U may be changed using the network interface as
well. The NTP output is provided on a 10/100 Base-T Ethernet connector. A recessed Reset
pushbutton is also provided. It is a multifunction control. Pressing the Reset button momentarily (one
second) allows the user to reinitialize the NTP output. The Reset button may also be used to change
the network parameters as described in section 5.4.
UL: When Option “UL” is specified, the unit’s power transformer is external to the unit, ie: a “wall wart” type
UL/CSA approved transformer is supplied. This option allows the ES-185U to be installed in facilities
requiring “UL” (or equivalent) approved equipment.
9.0 SPECIFICATIONS
9.1 General
GPS RECEIVER: Motorola 12-channel, M12+ Oncore Timing
GPS ANTENNA: Gain: 25 dB; Bandwidth: 2 MHz
Option ANT: Gain: 25 dB; Bandwidth: 25 MHz
1 PPS OUTPUTS: DB-9 connector, TTL outputs, positive edge true:
#1 - 20% duty output < 10 ηS accuracy, directly from receiver
#2 - 50% duty output < 1 mS accuracy, regenerated
ESE TC OUTPUT: BNC, drives 100 Readers, 4000' cable maximum
TC89 - drives non-”A” version Readers
TC90 - drives “Date” Readers and/or “A” version Readers
SMPTE TC OUTPUT: XLR, 600 ohm balanced or unbalanced
IRIG-B TC OUTPUT: BNC, AM or TTL
AM: 2-7 Vpp (mark amplitude), Mark to Space 3.3 to 1, 600Ω
TTL: ≥4.0 V high and ≤0.6 V low, 5 Vpp
RS-232C OUTPUT: DB-9 connector, ASCII Date & Time, sent once per second
USB OUTPUT: USB 2.0 Compatible
USB/RS-232C FORMAT: ASCII @ 9600 Baud, 8 Data, No Parity, 1 Stop, binary format
Format “D”: <255>DMYHMSDMYHMx<254>
The first DMYHMS is Day, Month, Year, Hours, Minutes and Seconds in UTC
The second DMYHM is Day, Month, Year, Hours and Minutes offset to local time
(seconds are the same as UTC)
x is the number of satellites that the unit is locked to (0 – 12, 0 = no lock, 1 – 12 = lock).
Transmission is once per second.
VIDEO INPUT: BNC, RS-170 composite video / blackburst, 1 Vpp, 75 ohm
ACCURACY: 1 PPS @ < 10 ηS
ESE TC @ 17 mS
IRIG-B @ 1 µS
SMPTE @ 0 Frames with respect to Video Sync
Option NTP: NTP output @ 15 mS
DRIFT: 33 mS/Day
COIN CELL BATTERY: Nominal Voltage: 3V
Nominal Capacity: 255 mAh
Dimensions: 23.0 mm x 3.0 mm
POWER: 110-120 VAC, 60 Hz, 15 Watts maximum
(Option "DC" only) +11 to +35 VDC, 1 Amp maximum
MECHANICAL: Rackmount Enclosure 1 ¾” H x 19” W x 9 ½” D
OPTION K: 10 MHz sine wave, BNC, 4 Vpp into 50 ohms (adjustable +/- 0.5V), 1 x 10-8 accuracy
1 kHz Square wave, BNC, 5 Vpp CMOS/TTL, 1 x 10-8 accuracy
1 PPS, 50% duty cycle, DB-9 (pin 5), 5 Vpp CMOS/TTL, < 2 µS of GPS when 10 MHz
lock LED is solid
OPTION NTP: Network Interface: RJ45 Ethernet 10Base-T or 100BaseTX (Auto-sensing)
Compatibility: Ethernet: Version 2.0/IEEE 802.3

Page 9
9.2 Rear Panel Connector Pin Designations
DB-9
Pin Function
1N/C
2RS-232 TxD
3RS-232 RxD
41 PPS (20% duty)
51 PPS (50% duty)
6Relay (HR option)
7Relay (HR option)
8GPS Lock
9Ground
SMPTE (XLR Connector)
Pin Function
1Chassis Ground
2Signal Hi
3Signal Lo
Note: If connecting SMPTE to an existing non-ESE Master Clock System (using SMPTE time code), it is
recommended to connect the balanced output of the ES-185U, using pins 2 & 3, to the existing system (unless the
existing system requires an unbalanced signal).

Page 10
10.0 ANTENNA MOUNTING INSTRUCTIONS
Refer to Figure 10A below and perform the following steps to install the Direct Mount Antenna.
1. Locate a spot that allows the Antenna a view of the sky and where the antenna can be mounted according
to the instructions that follow. Note: It is advised to test the Antenna at the location where it is to be
mounted prior to mounting (and drilling holes) to verify proper operation.
2. Two 1/8” holes on the mounting plate are used to mount the antenna. Two #4 screws can be used to
secure the mounting plate. If using plastic anchors, drill two holes of the appropriate diameter and depth
(using the template provided on page 7) through the deck plane where you are mounting the antenna.
3. Press into each hole a plastic anchor until the top of the anchor is flush with the deck plane.
4. Drill a 5/8" hole (for the antenna connector/cable) slightly below where the antenna is to be mounted.
5. Route the antenna connector/cable through the 5/8" hole and then fasten the Antenna to the deck plane
using two (2) #4 screws.
6. Connect the antenna connector/cable to the "Antenna" connector on the rear panel of the ES-185U Master
Clock.
7. Fill the hole (through which the antenna connector/cable was routed) with an all-weather caulking
compound.
Note: If desired, the Antenna can be "magnet mounted" to any steel or other appropriate surface. The
mounting plate should be removed from the Antenna. The magnet is mounted to the Antenna.
Figure 10A. Template For Antenna/Mounting Plate
Note: The Antenna Mounting Plate can also be used as a Template.

Page 11
11.0 ANTENNA CABLE TESTS & ALTERNATIVES
The antenna supplied with the ES-185U is designed to provide excellent reception under a variety of
conditions. The optimal location of the antenna is such that the antenna has a full view of the sky and is
mounted on a horizontal plane. However, the view of the sky may be through a window and the antenna may
be mounted indoors if the roof or upper floors do not shield the signal. Note: It is advised to test the Antenna at
the location where it is to be mounted prior to mounting (and drilling holes) to verify proper operation.
One of the main concerns when using a GPS receiver (Master Clock) is the distance between the antenna and
the receiver. The ES-185U Antenna is supplied with 16’ 5” of coax cable which can be connected directly to
the clock. If more cable is required an in-line amplifier may be necessary.
When extra cable is required, several options exist. The most simple and least expensive methods are
discussed below. It is, however, the ultimate responsibility of the end-user to decide which option will best
satisfy the specific situation. Please feel free to contact the ESE factory for assistance.
Also... please read section 12 which discusses the tests performed at ESE.
11.1Method 1 (low loss cable)
Several types of "low loss" coax cable are available including RG-8 and RG-213. Using any of these
types of cable "may" allow up to 300' of additional cable to be added to the 16’ 5” supplied with the
antenna. Both RG-8 and RG-213 are expensive (relative to RG-58) and are cumbersome to work with
due to their larger diameter.
11.2Method 2 (in-line amplifier)
The use of an in-line amplifier such as the LA-12F (manufactured by Raven and available from ESE) may
be more convenient than low loss cable. Installing one of these amps "may" allow up to 150' of RG-58 (or
300' of RG-8/RG-213) to be added to the 16’ 5” supplied. The LA-12FN has 'N' connectors which allow for
convenient interconnections with RG-8 and RG-213 cable. See Figure 11A.
11.3Method 3 (in-line amplifiers with power divider)
Due to the power limitations of the ES-185U's receiver and antenna, only one in-line amplifier can be
used. However, if a power divider such as the ES-AB1A is used, up to five (5) in-line amplifiers may be
added. The more amplifiers used, the shorter the cable run between amps. See Figure 11B.
LA-12F ES-185U
GPS Antenna
16’ 5” 150’ (RG-58)
Figure 11A. Antenna With LA-12F And 150' Of Extra Cable (RG-58)
LA-12FN LA-12FN LA-12FN
LA-12FNLA-12FN
ES-185U ES-AB1A
GPS Antenna
16’ 5” 100’ 100’ 100’
100’100’2’
Figure 11B. Antenna With 5) LA-12FN And 500' Of Extra Cable (RG-8) With ES-AB1A

Page 12
12.0 ESE TEST RESULTS
The methods mentioned in section 11 are conclusions based upon actual tests performed by ESE and on
information provided by various manufacturers. The performance of your unit may differ due to antenna
position and obstructions to its line of sight, weather/atmospheric conditions, cable length or signal reflections.
Listed below are the "best" consistent performances. That is, they were repeatable performances on a
consistent basis... not just fluke observations.
Caution is recommended: as the GPS Satellites age, their signal strength may decrease and today's cable
length could cause undesirable results at a later date.
The ESE factory conducted several tests which demonstrate how the ES-185U/GPS Antenna can be expected
to operate for given sets of circumstances. All tests were conducted at ESE (in El Segundo, CA) in 1998 and
due to the architecture of the GPS Satellite Constellation, can be considered applicable most anywhere in the
world.
12.1Test 1
The first test shows that up to 112' of RG-58 cable can be added to the 16’ 5” without any significant loss
in signal. (Adding 125' impaired the clock's performance.)
12.2Test 2
When using a single LA-12F, in-line amplifier with 150' of RG-58 cable (in addition to the 16’ 5” supplied),
the clock would "lock-on" in a nominal amount of time. (Adding 175' impaired the clock's performance.)
12.3Test 3
Using an ES-AB1A (power divider) and two (2) LA-12F with 100' of RG-58 cable attached to each (216’
5” total) permitted the clock to "lock-on" in a nominal amount of time. Adding a third LA-12F with 75' of
RG-58 cable did not impair the clock's performance, however, increasing the 75' to 100' did impair the
clock's performance.
12.4Test 4
Using an ES-AB1A (power divider) and four (4) LA-12F with 75' of RG-58 cable attached to each (316’ 5”
total) permitted the clock to "lock-on" in a nominal amount of time. Adding a fifth LA-12F with 25' of RG-58
cable also permitted the clock to "lock-on" in a nominal amount of time. Increasing the 25' to 50' impaired
the clock's performance.
All of the tests mentioned above were conducted twice; first with the antenna indoors and second with the
antenna outdoors. (Indoors refers to the ESE factory which is a single story building with a wood ceiling
and asphalt composite roofing. And outdoors, the antenna had a very narrow look at the sky with
approximately six feet of clearing between buildings.)
In all cases, the ES-185U "Locked-on" within fifteen minutes, and in less time when the antenna was
outside. ("Locked-on" refers to starting the clock from a completely "powered down" mode and the nine-
digit display "catching" real-time with the "GPS Lock" LED lit.)
Various tests conducted away from the factory show that the exact unit which took five minutes to lock-on
at the factory, may take up to 45 minutes at a different location. Possible explanations for this
phenomenon lead us to believe that atmospheric conditions or poor antenna locations may be
responsible.

Page 13
13.0 APPLICATION NOTES
13.1Application Note 1
ESE has noticed that the manufacturers' cable length specifications for the Motorola GPS Receiver and
the Raven LA-12F differ from the test results of ESE. Please be aware that Motorola specs the maximum
cable distance between the antenna and the receiver is 16’ 5” (5 meters) without amplification. Also,
please be aware that Raven specs the maximum RG-58 cable that the LA-12F can drive is 50 feet.
ESE's test results may indicate that longer lengths of cable may be used. We are not inferring that the
longer cable lengths should be used. We are only reporting the results of our tests and repeat the caution
mentioned earlier.
Caution is recommended:
as the GPS Satellites age, their signal strength may decrease and excessive cable length may cause
undesirable results.
13.2Application Note 2
All ESE tests were conducted using RG-58 coax cable. According to several manufacturers of low loss
cable, the signal loss attributable to cable length can be reduced with the use of "low loss" cable.
According to the RG-8 and RG-213 cable specifications, when compared to RG-58, cable lengths may be
doubled or more with "equal to" or "better than" results.
13.3Application Note 3
Once an ES-185U has "Locked-on", the receiver creates a semi-permanent "Library" of where it expects
to "see" a satellite(s) at a specific point in time. However, if after "Locking-on", the unit is relocated (for
instance, from the ESE factory in California to an end-user's site in Europe), the unit's 1 PPS (and other
outputs') accuracy may appear erratic for up to three hours. When the receiver has created an updated
Library, all outputs will then comply with the specifications discussed in this manual.

Page 14
14.0 FRONT AND REAR VIEWS
GPS
LOCK
HOUR MINUTE SECOND
ES-185U GPS MASTER CLOCK
DAY 10 MHz
LOCK
The 10 MHz Lock LED is provided with Option K.
1/2 AMP
FUSE
OFF
OUTPUT OUTPUT OUTPUT INPUT
BATTERY
ON
SMPTE/EBU OPTIONAL
1 KHz 10 MHz ANTENNA
NTP
OUTPUT
OUTPUT INPUT
OUTPUT RESET
DB9
USB IRIG-B VIDEO
TC90
TC89 ESE NTP PORT
Options K and NTP are shown.

Page 15
15.0 PARTS LIST
QTY DESIGNATION DESCRIPTION PART NUMBER
1Z5 INTEGRATED CIRCUIT 4001
1Z6 INTEGRATED CIRCUIT 4020
1Z18 INTEGRATED CIRCUIT 4028
1Z7 INTEGRATED CIRCUIT 4070
2Z11, Z12 INTEGRATED CIRCUIT 4503
2Z4, Z26 INTEGRATED CIRCUIT 74HCT04
1Z23 INTEGRATED CIRCUIT 74HCT08
1Z15 INTEGRATED CIRCUIT 74HCT93
1Z19 INTEGRATED CIRCUIT 74HCT244
1Z8 INTEGRATED CIRCUIT TL072
2Z9, Z10 INTEGRATED CIRCUIT 1458
1Z13 INTEGRATED CIRCUIT LM1881N
1Z3 INTEGRATED CIRCUIT MAX 233CPP/ADM233LJM
1Z1 INTEGRATED CIRCUIT LM317T
2Z20, Z21 INTEGRATED CIRCUIT UCN5801
1Z2 INTEGRATED CIRCUIT TL 750M05CKC
1Z17 INTEGRATED CIRCUIT 87C530QNL-185U
1Z22 INTEGRATED CIRCUIT LM2937ET-3.3
1Z24 INTEGRATED CIRCUIT FT232BM
1Z25 INTEGRATED CIRCUIT 93C46
1Z16 OSCILLATOR 32.0 MHZ VCTCXO
1Z14 OSCILLATOR 16.384 MHZ VCTCXO
1X1 CRYSTAL 6.0 MHz
8R46 - R53 RESISTOR 10 OHM 1/4 W
6R5, R7, R8, R18, R25, R26 RESISTOR 27 OHM 1/4W
5R28, R29, R68, R69, R74 RESISTOR 27 OHM 1/4W
1R59 RESISTOR 47 OHM 1/4W
1R30 RESISTOR 75 OHM 1/2 W
1R54 RESISTOR 150 OHM 1/2 W
2R4, R58 RESISTOR 220 OHM 1/4 W
1R66 RESISTOR 470 OHM 1/2 W
1R67 RESISTOR 1.5K 1/4 W
3R3, R60, R61 RESISTOR 1.8K 1/4W
2R2, R72 RESISTOR 2.2K 1/4 W
5R34, R35, R56, R76, R77 RESISTOR 2.7K 1/4 W
2R12, R13 RESISTOR 4.3K 1/4W
1R70 RESISTOR 4.7K 1/4 W
1R64 RESISTOR 5.1K 1/4 W
10 R11, R17, R38 - R45 RESISTOR 10K 1/4 W
5R55, R57, R71, R73, R75 RESISTOR 10K 1/4 W
1R10 RESISTOR 15K 1/4 W
2R22, R27 RESISTOR 27K 1/4W
1R20 RESISTOR 51K 1/4 W
2R23, R24 RESISTOR 100K 1/4 W
1R21 RESISTOR 120K 1/4 W
1R19 RESISTOR 240K 1/4 W
1R31 RESISTOR 680K 1/4 W
1R15 RESISTOR 1 MEGOHM 1/4 W
3R1, R33, R78 POTENTIOMETER 1K OHM MINI POT
1R16 POTENTIOMETER 50K OHM MINI POT
2C42, C43 CERAMIC CAPACITOR 25pf 50v Cer K
PCB COMPONENTS

Page 16
QTY DESIGNATION DESCRIPTION PART NUMBER
1C33 CERAMIC CAPACITOR .001uf 50v Cer K
1C21 CERAMIC CAPACITOR .001uf 100v Mylar
1C17 CERAMIC CAPACITOR .002uf 50v Cer Z
1C41 CERAMIC CAPACITOR .047uf 50v Cer Z
1C16 MYLAR CAPACITOR .047uf 100v Mylar
7C9 - C11, C12, C15, C19, C22 CERAMIC CAPACITOR .1uf 50v Cer Z
6C28 - C31, C34, C35 CERAMIC CAPACITOR .1uf 50v Cer Z
3C38 - C40 CERAMIC CAPACITOR .1uf 50v Cer Z
1C18 ELECTROLYTIC CAPACITOR 1uf 50v LL R El
2C7, C37 ELECTROLYTIC CAPACITOR 10uf 16v LL R El
2C26, C27 ELECTROLYTIC CAPACITOR 10uf 25v NP R El
1C36 TANTALUM CAPACITOR 22 UF TANT
2C8, C20 ELECTROLYTIC CAPACITOR 100uf 25v R El
5C2 - C6 ELECTROLYTIC CAPACITOR 3300 UF 25V
1C1 ELECTROLYTIC CAPACITOR 4700UF R EL
1Q1 TRANSISTOR 2N5484
9Q3 - Q11 TRANSISTOR PN2222
2D5, D8 DIODE 1N4003
3D1 - D3 DIODE 1N5400 OR 5F05
1D7 LED GREEN LED (T-1 3/4)
1BATTERY FUSE 2 AMP FUSE (2791)
1FUSE HOLDER 534-4245 FUSE HOLDER
1BATTERY HOLDER BH908T-C
1COIN CELL BATTERY BR2330
58 PIN DIP SOCKET 8 PIN DIP SOCKET
614 PIN DIP SOCKET 14 PIN DIP SOCKET
416 PIN DIP SOCKET 16 PIN DIP SOCKET
220 PIN DIP SOCKET 20 PIN DIP SOCKET
222 PIN DIP SOCKET 22 PIN DIP SOCKET
152 PIN PLCC SOCKET, THRU HOLE 151-1553
1MINI SLIDE SWITCH MINI SLIDE SWITCH
4RIGHT ANGLE BNC RIGHT ANGLE BNC
1RT. ANGLE 9 PIN FEMALE RT. ANGLE 9 PIN FEMALE
1USB CONNECTOR KUSB-BS-1-N-WHT
1HEADER SFMC-105-01-S-D
1M12+ TIMING GPS RECEIVER P273T12T17
1HEAT SINK 532-504222B00
2L BRACKET 616 'L' BRACKET
5N1 - N5 DISPLAY LTD 6840Y
1PCB ES185A DISPLAY
1PCB ES-UMB
QTY DESIGNATION DESCRIPTION PART NUMBER
3T1 - T3 TRANSFORMER P6465
11/2 AMP FUSE (5mm x 20mm) 5765-35500
1IEC SOCKET W/ FUSE SNAP PIN IEC SOCKET
13 WIRE CORD/PLUG 3 WIRE CORD/PLUG
1CLIP & LENS FOR LED CLIP & LENS FOR LED
1CONNECTOR 9 PIN MALE D-SUB
PCB COMPONENTS
CHASSIS COMPONENTS

Page 17
QTY DESIGNATION DESCRIPTION PART NUMBER
1D-SUB HOOD 9 PIN D-SUB HOOD
1XLR CONNECTOR XLR-3-32 (M)
1GPS ANTENNA CABLE 1000129120 (M12 CBL)
1ANTENNA ANTENNA SMA35
1USB A-B CABLE 172-1024
1SWITCH SPDT TOGGLE SWITCH
2BATTERY LUG BATTERY LUG #902
1GROUND LUG #6 GROUND LUG
1BATTERY NP1.3-6V BATTERY
1BATTERY BRACKET 165/185 BATT. BRACKET
1CASE & HARDWARE ES-185U
QTY DESIGNATION DESCRIPTION PART NUMBER
1(ANT) ANTENNA EMI CONE ANTENNA
1(DC - 12V INPUT) DC/DC CONVERTER UM2804
1(DC - 28V INPUT) DC/DC CONVERTER 1505D20UR
1(DC) FUSE 2 AMP FUSE (2791)
1(DC) CONNECTOR 712A
1(DC) CONNECTOR 760K
1D4 (HR) DIODE 1N4003
1R32 (HR) RESISTOR 4.7K 1/4 W
1Q2 (HR) TRANSISTOR PN2907
1C32 (HR) CERAMIC CAPACITOR .1uf 50v Cer Z
1K1 (HR) RELAY 1A5A RELAY
3T1 - T3 (J) TRANSFORMER P8705/SSA5-6.3/230
1(K) PCB ES-110M12
2R62, R63 (NTP) RESISTOR 1.8K 1/4W
1R65 (NTP) RESISTOR 5.1K 1/4 W
1C14 (NTP) CERAMIC CAPACITOR .002uf 50v Cer Z
1(NTP) NETWORK INTERFACE XPRT
1(NTP) RT. ANGLE PB SWITCH ZP33W0000/U4322
1(UL) FUSE HOLDER HTA FUSE HOLDER
1(UL) FUSE 4A FUSE
1(UL) UL TRANSFORMER 57A-6-3000Y (UL)
1(UL) UL POWER PLUG UL POWER PLUG
ALL INFORMATION CONTAINED IN THIS MANUAL IS SUBJECT TO CHANGE WITHOUT NOTICE.
OPTIONAL COMPONENTS
NOTE: THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY WITH THE LIMITS FOR A CLASS A DIGITAL
DEVICE, PURSUANT TO PART 15 OF THE FCC RULES. THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE
PROTECTION AGAINST HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED IN A COMMERCIAL
ENVIRONMENT. THIS EQUIPMENT GENERATES, USES AND CAN RADIATE RADIO FREQUENCY ENERGY AND, IF
NOT INSTALLED AND USED IN ACCORDANCE WITH THE INSTRUCTION MANUAL, MAY CAUSE HARMFUL
INTERFERENCE TO RADIO COMMUNICATIONS. OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS
LIKELY TO CAUSE HARMFUL INTERFERENCE IN WHICH CASE THE USER WILL BE REQUIRED TO CORRECT THE
INTERFERENCE AT HIS OWN EXPENSE.
IF THRU HOLE COMPONENT REMOVAL IS REQUIRED, WE RECOMMEND REMOVING ALL SOLDER USING A 35W OR
SMALLER SOLDERING IRON AND SOLDER WICK TO PREVENT DAMAGE TO THE PRINTED CIRCUIT BOARD. IF SMT
COMPONENT REMOVAL IS REQUIRED, WE RECOMMEND USING SMT EQUIPMENT. IF THIS EQUIPMENT IS NOT
AVAILABLE, THE UNIT SHOULD BE RETURNED TO ESE.
CHASSIS COMPONENTS

Page 18
15.1Option K
QTY DESIGNATION DESCRIPTION PART NUMBER
1Z1 INTEGRATED CIRCUIT 4503
1Z2 INTEGRATED CIRCUIT DS87C520MCL-110M12K
1Z3 INTEGRATED CIRCUIT 74HCT4053 (PHIL)
1Z4 INTEGRATED CIRCUIT 74HC4046
1Z5 INTEGRATED CIRCUIT 74HCT93 (NO LS)
6Z7 - Z12 INTEGRATED CIRCUIT 74HC161
1Z13 INTEGRATED CIRCUIT 74HC14
1Z14 INTEGRATED CIRCUIT CLC 409AJP
1Z16 INTEGRATED CIRCUIT LMV7219
1Z17 INTEGRATED CIRCUIT AD823AN
1Z6 OSCILLATOR 20.0 MHz OSCILLATOR
2R3, R21 RESISTOR 10 OHM 1/4 W
3R12, R13, R27 RESISTOR 27 OHM 1/4W
1R2 RESISTOR 47 OHM 1/4W
1R17 RESISTOR 100 OHM 1/4 W
1R22 RESISTOR 330 OHM 1/4 W
1R5 RESISTOR 390 OHM 1/4 W
1R7 RESISTOR 510 OHM 1/4 W
2R4, R16 RESISTOR 1K 1/4 W
5R8, R14, R18 - R20 RESISTOR 10K 1/4 W
1R15 RESISTOR 10 MEGOHM 1/4 W
1R6 POTENTIOMETER 1K OHM mini pot
1C21 CERAMIC CAPACITOR 47pf 50v Cer K
1C15 CERAMIC CAPACITOR .01uf 50v Cer Z
13 C1, C3 - C6, C8 - C14, C28 CERAMIC CAPACITOR .1uf 50v Cer Z
2C22, C23 POLY FILM CAPACITOR 4.7uF POLY FILM 100V
1C29 ELECTROLYTIC CAPACITOR 10uf 16v LL R El
1C2 ELECTROLYTIC CAPACITOR 1000uf 16v R El
1C20 VARIABLE CAPACITOR 5-30 PF TRIMM 5MM V
1D2 LED Green LED (T-1 3/4)
1D3 DIODE 1N4740
1L1 INDUCTOR 3.3 uH INDUCTOR
1SOCKET 8 PIN DIP SOCKET
2SOCKET 14 PIN DIP SOCKET
9SOCKET 16 PIN DIP SOCKET
1SOCKET 40 PIN DIP SOCKET
1PCB ES-110M12
QTY DESIGNATION DESCRIPTION PART NUMBER
1CLIP & LENS FOR LED CLIP & LENS FOR LED
2CONNECTOR BNC (UG-1094)
IF COMPONENT REMOVAL IS REQUIRED, WE RECOMMEND REMOVING ALL SOLDER USING A35W OR
SMALLER SOLDERING IRON AND SOLDER WICK TO PREVENT DAMAGE TO THE PRINTED CIRCUIT BOARD.
ALL INFORMATION CONTAINED IN THIS MANUAL IS SUBJECT TO CHANGE WITHOUT NOTICE.
PCB COMPONENTS
CHASSIS COMPONENTS