SDI HPDA-15RMi-CW User manual

HPDA-15RMi-CW
1-100 MHz ISOLATION AMPLIFIER
OPERATING MANUAL
SPECTRADYNAMICS, INC • 1849 Cherry St. Unit 2 • Louisville, CO 80027
Phone: [phone] • Fax: [phone]
www.spectradynamics.com
SPECTRADYNAMICS, INC

HPDA-15RMi-CW 1-100 MHz Isolation Amplifier Operating Manual
Copyright © 2020 SpectraDynamics, Inc. All rights reserved.
HPDA-15RMi-CW:R01-2021-FA-MD

Contents
1.0 Introduction …………………………………………………………………….... 1
2.0 Safety and preparation for use ………………………………..……….…….. 2
2.1 Electrical ……………….…………………………………………….……. 2
2.2 Instrument ……..…………….………………………………….….…….. 3
3.0 Front panel description …….…………………………………………….…… 4
4.0 Back panel description ………………………………………………….……. 5
5.0 Installation ……………………………………………………………….…….. 6
6.0 Operation ……………………………………………………………………… 7
7.0 Troubleshooting ………………………………………………………………. 8
8.0 Specifications …………………………………………………………………. 9
9.0 Warranty and service ………………………………………………………… 12

1.0 Introduction
Page 1
The HPDA-15RMi-CW is a High Performance Distribution and Isolation Amplifier designed
to distribute state-of-the-art atomic frequency standards. This model offers exceptionally
low additive phase noise and has a frequency bandwidth of 1 MHz to 100 MHz. This
amplifier may be used in time scale applications where phase stability is of paramount
importance.
The amplifier is designed for maximum flexibility in system configuration in a 19 inch
rackmount, 1U enclosure and may contain up to three RF signal distribution modules.
Each module provides five isolated outputs. All the output power levels are monitored and
compared to a preset threshold of 0 dBm. If the signal level on any output drops below this
threshold, the monitor LED for the corresponding module will turn off indicating a fault
condition.
The HPDA-15RMi-CW is designed to be powered by a 100 to 240 VAC mains source or
by a +12 to +36 VDC power source. The DC power module may be used as a main power
source for the instrument or in conjunction with the AC power module as a backup power
supply in case of loss of the main AC power. The instrument is designed to automatically
switch from AC to DC supply operation using a Schottky diode network and charge
storage capacitors to avoid any glitches and ensure uninterrupted continuous operation.
HPDA-15RMi-CW Options:
Other HPDA Options:
Part Number Number of
Inputs
Number of
Outputs
AC
Operation
DC
Operation
HPDA-15RMi-CW 315 √√
HPDA-15RMi-C1W 110 √√
HPDA-15RMi-C2W 210 √√
HPDA-15RMi-C3W 115 √√
Part Number Number of
Inputs
Number of
Outputs
Auto
Switch
AC
Operation
DC
Operation
HPDA-15RMi-A15√√
HPDA-15RMi-B315 √
HPDA-15RMi-B1 110 √
HPDA-15RMi-B2 210 √
HPDA-15RMi-B3 115 √
HPDA-15RMi-S210 √√√

2.0 Safety and Preparation for Use
Page 2
The HPDA-15RMi-CW was designed for indoor use only and is not intended for operation
outdoors or in a wet environment. The instrument may be mounted in a standard 19-inch
instrumentation rack or may be used on a laboratory bench.
Inspect the instrument and power cords for damage before first use.
2.1 Electrical Safety and Preparation for Use
Voltages capable of causing injury or death are present in this instrument. Use extreme
caution whenever the instrument cover is removed.
Line Voltage
This instrument is designed to operate with a 100 to 240 VAC, 47 to 63 Hz power source.
DC operation with +12 to + 36 VDC, + 2 Amperes is also possible.
Fuse
A 1.0 Ampere 250V 5X10mm slow-blow fuse is used for 100-240 VAC operation.
A 2.0 Ampere 250V 5X10mm slow-blow fuse is used for the DC power protection.
Only replace fuse with the same type and specifications.
AC Power
The instrument has a detachable three wire power cord for connection to a grounded AC
power source. The enclosure of the unit is directly connected to the outlet ground to protect
against electrical shock. Always use an outlet with a protective ground and do not disable
this safety mechanism. Detaching the AC power cord is the only option of disconnecting
the unit from the AC mains supply. Make sure you have access to the rear panel or provide
an external accessible AC disconnect means for the HPDA-15RMi-CW.
DC Power
The instrument has a RM12BRD-6PH(71) DC connector on the back panel with the
following configuration:
Pin 1 NC
Pin 2 NC
Pin 3 NC
Pin 4 +12 to +36 VDC power return
Pin 5 +12 to +36 VDC power
Pin 6 Chassis GND /Earth GND
Please note that the power return (pin 4) is NOT connected to the instrument case ground
internally, however both ground connections pin 4) and pin 6) are available at the DC
power connector and may be connected together at this point.

2.0 Safety and Preparation for Use
Page 3
Requirements for the external DC power supply
The following specifications should be used to ensure the optimum performance:
DC Supply voltage +12 to +36 VDC, 2 Amps
Line regulation +/- 0.05% for a 10% line change
Load regulation +/- 0.05% for a 50% load change
Output ripple < 5mV peak-to-peak
Pin configuration Same as RM12BRD-6PH(71) DC connector on the back panel
Verify that the connector from your DC power supply has the correct pin configuration. Do
not apply AC voltage to the DC power connector. Failure to follow these directions may
cause injury or death to personnel, cause irreparable damage to the instrument and voids
all warranties.
2.2 Instrument Safety and Preparation for Use
The HPDA-15RMi-CW is designed to distribute RF signals with a frequency of 1 to 100
MHz . The recommended level for the RF input signal is 0 dBm to +15 dBm. Any output
level below 0 dBm will trigger a fault condition turning off the monitor LED for the
corresponding RF module.
Input signals must be kept below +20 dBm as greater power levels will damage the unit
and void all warranties. The HPDA-15RMi-CW RF outputs are DC isolated from the
chassis ground to prevent ground loops. These outputs are rated to a maximum of 50 V.
Absolute Maximum Ratings
Input RF Power +20 dBm Maximum
Reverse RF Power +20 dBm Maximum
Voltage at the RF Input +50 V Maximum
Voltage at the RF Output +50 V Maximum
Storage Temperature -10 to +75 ºC
Operation Environment 0 to +50 ºC

3.0 Front Panel Description
Page 4
AC Power LED
The AC Power LED turns on when AC power is applied to unit.
DC Power LED
The DC Power LED is on when DC power is applied to unit.
Monitor 1, 2, 3, LEDs
The HPDA-15RMi-CW may contain up to three RF distribution modules, each module is
monitored by the corresponding MONITOR LED labeled 1, 2 and 3. All MONITOR LEDs are
installed on every HPDA-15RMi-CW option. Only HPDA-15RMi-CW options with 3 modules
come with three functioning monitor LEDs. All other options will have a non-working monitor
LED. Please refer to HPDA-15RMi-CW table options on Page 1.
The monitor LEDs will be on if all RF outputs of the corresponding module are greater than
0 dBm. RF signal levels less than 0 dBm will trigger a fault condition and the Monitor LED
will not light up. However the HPDA-15RMi-CW will still provide five buffered copies per
distribution module of the RF input signal on the back panel.

4.0 Back Panel Description
Page 5
AC Power
The HPDA-15RMi-CW is configured to operate on 100 to 240 VAC.
DC Power
This instrument may also operate on DC power from +12 to +36 VDC as the main power
supply. When the HPDA-15RMi-CW is set up to operate with both AC and DC power sources
at the same time the DC power is used as backup power in case of AC power outages.
INPUT
A RF Signal within the range of 1 MHz to 100 MHz with power level of +13 dBm +/- 2 dBm may
be connected to the SMA connector labeled INPUT.
Part number HPDA-15RMi-CW includes three independent RF distribution modules, each SMA
input provides five buffered copies of the input signal as shown on the picture above.
Other configurations are available and may be selected by the part numbers shown below.
OUTPUTS
The number of available OUTPUTS per RF input are determined by the part number below.
Any HPDA-15RMi-CW output may be used to drive the input of another distribution amplifier.
HPDA-15RMi-C1W
HPDA-15RMi-C2W
HPDA-15RMi-C3W

5.0 Installation
Page 6
The instrument may be mounted in a standard 19-inch instrument rack or may be operated
on a laboratory bench.
Connecting Power
The HPDA-15RMi-CW ships with a standard North American or European IEC power cord
and a RM12BPE-6S(81) DC connector.
You may prepare a DC power cable with the DC connector following the connector
configuration on page 3.
Locate the AC POWER entry module on the rear of the enclosure and connect the power
cord. You may also connect the optional DC POWER Connector to an appropriate DC
power source.

6.0 Operation
Page 7
Plug the power cord into an appropriate AC power outlet. You may also connect the DC
power cable to an appropriate DC power supply.
The HPDA-15RMi-CW is designed to distribute signals from 1 MHz to 100 MHz. The RF
input has a 50-ohm input impedance. Provide a signal within the mentioned frequency
range to the any of the SMA connectors available on the back panel labeled INPUT. If the
RF signal has a power level greater than 0 dBm, the corresponding monitor LED of the
selected module located on the front panel will light up.
Five buffered copies, per distribution module, of the RF signal(s) will be available on the
SMA connectors labeled OUTPUTS located on the back panel. All outputs are AC
coupled and the grounds are DC isolated to reduce the effect of ground loops. Make sure
that the amplifier ground does not float to a potential greater than 50 VDC from the
chassis ground. An output ground potential greater than 50 VDC will damage the
amplifier and could cause injury or death to personnel.

7.0 Troubleshooting
Page 8
Do not attempt to service or adjust the instrument unless another person, capable of
providing first aid or resuscitation, is present. If there are problems that cannot be
resolved by the troubleshooting steps below please contact technical support.
Technical Support
Tel: [phone] , Fax: [phone]
[e-mail], www.spectradynamics.com
AC and/or DC Power LED does not turn on.
Disconnect the power cords and remove the top cover. Check the main AC and/or DC
power fuse and power cord. If any fuse is blown replace with same type and rating. Please
contact SDI if the any of the fuses blow again or if the event that caused the fuse to blow is
not known.
Monitor LEDs are off.
Check to see if the RF signal provided to the instrument is greater than 0 dBm.
Check to see if a signal is present at all outputs of the signal distribution module.
The Monitor LED will remain off with a power lever under 0 dBm, but will still provide
buffered copies of the RF input signal. If the instrument is providing the copies of the input
signals you may continue using the HPDA-15RMi-CW.
If the power level of the RF signal provided is greater than 0dBm and the Monitor LEDs
remain off, the instrument will have to be returned for repair.

8.0 Specifications
Page 9
Specifications for Part Numbers HPDA-15RMi-CW and HPDA-15RMi-C2W
All tests done at 10 MHz and +13 dBm input unless otherwise specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input power level 1 dB compression 17 18 - dBm
Bandwidth +/- 1 dB 1 - 100 1 - 100 - MHz
Gain @ 10 MHz 0 0.2 0.5 dB
Impedance Input
Output
-
-
50
50
-
-
Ohms
Return loss Input (S11) 10 MHz
Output (S22) 10 MHz
-
-
-35
-35
-30
-30
dB
Distortion +13 dBm
+17 dBm
-
-
-48
-42
-45
-40
dBc
Isolation Output to output
Output to input
130
140
140
145
-
-
dB
Phase noise 1 Hz
10 Hz
1 kHz
10 kHz
-
-
-
-
-155
-165
-170
-171
-150
-160
-168
-170
dBc/Hz
Temp.-delay
Coefficient
0 - 50 ºC - 1.2 1.5 ps/ºC
Allan Deviation Averaging Time in (s)
1
10
100
1000
10000
-
-
-
-
-
4.0 E-14
5.0 E-15
2.0 E-15
6.0 E-16
4.0 E-16
5.0 E-14
7.0 E-15
3.0 E-15
1.0 E-15
5.0 E-16

8.0 Specifications
Page 10
Specifications for Part Numbers HPDA-15RMi-C1W and HPDA-15RMi-C3W
All tests done at 10 MHz and +13 dBm input unless otherwise specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input power level 1 dB compression 17 18 - dBm
Bandwidth +/- 1 dB 1 - 100 1 - 100 - MHz
Gain @ 10 MHz 0 0.2 0.5 dB
Impedance Input
Output
-
-
50
50
-
-
Ohms
Return loss Input (S11) 10 MHz
Output (S22) 10 MHz
-
-
-35
-35
-30
-30
dB
Distortion +13 dBm
+17 dBm
-
-
-45
-42
-40
-40
dBc
Isolation Output to output
Output to input
130
140
140
145
-
-
dB
Phase noise 1 Hz
10 Hz
1 kHz
10 kHz
-
-
-
-
-150
-160
-169
-169
-147
-157
-167
-167
dBc/Hz
Temp.-delay
Coefficient
0 - 50 ºC - 1.2 1.5 ps/ºC
Allan Deviation Averaging Time in (s)
1
10
100
1000
10000
-
-
-
-
-
4.0 E-14
5.0 E-15
2.0 E-15
6.0 E-16
4.0 E-16
5.0 E-14
7.0 E-15
3.0 E-15
1.0 E-15
5.0 E-16

8.0 Specifications
Page 11
Rackmount chassis 1U H, 19“ W, 14” D
Weight 4.5 kg, (10 lbs)
AC Input Voltage Range 90-264 VAC, 22 W, 47-63 Hz
DC Input Voltage Range 12-36 VDC, 13 W
Storage temperature -10 to +75 ºC
Operation environment 0 to +50 ºC
Humidity 5% to 95% Non-condensing

Page 12
Warranty
The HPDA-15RMi-CW is warranted to be free of defects under normal operating
conditions, as specified, for one year from date of original shipment from
SpectraDynamics, Inc. (SDI). SDI’s obligation and liability under this warranty is
expressly limited to repairing or replacing, at SDI’s option, any product not meeting the
said specifications. This warranty shall be in effect for one (1) year from the date a HPDA-
15RMi-CW is sold by SDI. SDI makes no other warranty, express or implied, and makes
no warranty of the fitness for any particular purpose. SDI’s obligation under this warranty
shall not include any transportation charges or costs of installation or any liability for direct,
indirect, or consequential damages or delay. Any improper use, operation beyond
capacity, substitution of parts not approved by SDI, or any alteration or repair by others in
such manner as in SDI’s reasonable judgement affects the product materially and
adversely shall void this warranty. No employee or representative of SDI is authorized to
change this warranty in any way or grant any other warranty.
Service
Do not attempt to service or adjust the instrument unless another person, capable of
providing first aid or resuscitation, is present. Please remember that any alteration or repair
may void the warranty. Contact SDI with any questions or to request an RMA if a repair is
needed.
SpectraDynamics, Inc.
1849 Cherry Street Unit 2.
Louisville, CO 80027
USA
Tel: [phone]
Fax: [phone]
[e-mail]
www.spectradynamics.com
9.0 Warranty and Service

Page 13
EC Declaration of Conformity
The HPDA-15RMi-CW distribution amplifier has been designed and manufactured in
accordance with the below referenced Standards and complies with all essential
requirements of the Directives listed below.
Directives:
2014/35/EU of the European Parliament and of the Council of 26 February 2014 on
the harmonization of the laws of the Member States relating to the making available on the
market of electrical equipment designed for use within certain voltage limits.
2014/30/EU The Electromagnetic Compatibility Directive and its amending directives.
2011/65/EU of the European Parliament and of the Council of 8 June 2011 on the
restriction of the use of certain hazardous substances in electrical and electronic
equipment.
Standards:
EN 55011 2009 + A1: 2010, Product family standard for Industrial, Scientific and
Medical (ISM) equipment.
EN 61010-1:2010 Safety Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use – Part 1: General Requirements
EN 61326-1:2013 Electrical Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use – Part 1: General Requirements