Cross Technologies 1200-88 User manual

Instruction Manual Model 1200-88
IF Amplifier
August 2010 Rev. A
MENU
EXECUTE
MODEL 1200
CROSS TECHNOLOGIES INC.
G1=-10 LVL1=<+5
G2=+15 LVL2= +12
REMOTECH2
PEAK POWER ALARM
AMPLIFIER
CH1
PEAK
Data, drawings, and other material contained herein are proprietary to Cross Technologies, Inc.,
but may be reproduced or duplicated without the prior permission of Cross Technologies, Inc.
for purposes of operating the equipment. Printed in USA.
When ordering parts from Cross Technologies, Inc., be sure to include the equipment
model number, equipment serial number, and a description of the part.
CROSS TECHNOLOGIES, INC.
6170 Shiloh Road
Alpharetta, Georgia 30005
[phone]
FAX [phone]
Toll Free 888-900-5588
WEB: www.crosstechnologies.com
E-MAIL: [email protected]

INSTRUCTION MANUAL
MODEL 1200-88 Dual IF Amplifier
TABLE OF CONTENTS PAGE
Warranty 2
1.0 General 3
1.1 Equipment Description 3
1.2 Technical Characteristics 4
1.3 Monitor & Control Interface 5
2.0 Installation 7
2.1 Mechanical 7
2.2 Rear Panel Inputs & Outputs 8
2.3 Front Panel Controls & Indicators 9
2.4 Operation 10
2.5 Menu Settings 11
3.0 Environmental Use Information 14
WARRANTY - The following warranty applies to all Cross Technologies, Inc. products.
All Cross Technologies, Inc. products are warranted against defective materials and
workmanship for a period of one year after shipment to customer. Cross Technologies,
Inc.’s obligation under this warranty is limited to repairing or, at Cross Technologies,
Inc.’s option, replacing parts, subassemblies, or entire assemblies. Cross Technologies,
Inc. shall not be liable for any special, indirect, or consequential damages. This warranty
does not cover parts or equipment which have been subject to misuse, negligence, or
accident by the customer during use. All shipping costs for warranty repairs will be
prepaid by the customer. There are not other warranties, express or implied, except as
stated herein.
CROSS TECHNOLOGIES, INC.
6170 Shiloh Road
Alpharetta, Georgia 30005
[phone]
FAX [phone]
Toll Free 888-900-5588
WEB: www.crosstechnologies.com
E-MAIL: [email protected]
1200-88 Manual, Rev. A Page 2 8/18/10

MODEL 1200-88 Dual IF Amplifier
1.0 General
1.1 Equipment Description
The 1200-88 IF Amplifier is a dual channel amplifier each providing manual gain control (MGC) for a 0.1 to
100 MHz IF signal for a -50 to 0 dBm input signal. The gain can be manually adjusted from -25 to +25 dB for
up to a +10 dBm output. The 1200-88 has a band limiting lowpass filter. Multi-function push button switches
select the gain of each channel (-25 to +25 dB, selectable in 1 dB steps) and the settings appear on the LCD
display. Front panel LEDs light when DC power is applied (green) or the output level exceeds +13 dBm (red).
Connectors are BNC female for IF input and output. A DB9 connector provides indication and remote control
of gain via a 9600 baud, RS232C interface. The 1200-88 is powered by a 100-240 ±10% VAC switching power
supply and is housed in a 1RU x 16” deep chassis.
MENU
EXECUTE
MODEL 1200
CROSS TECHNOLOGIES INC.
G1=-10 LVL1=<+5
G2=+15 LVL2= +12
REMOTECH2
PEAK POWER ALARM
AMPLIFIER
CH1
PEAK
FRONT PANEL
AC
GND
J4 J5J1
OUTPUT INPUT OUTPUT
J10
AND
MONITOR
CONTROL
15 234 6789
J2
INPUT
CHANNEL 1 CHANNEL 2
REAR PANEL
FIGURE 1.1 Front and Rear Panels
IF 2
OUT
IF 2
IN ATT ATT
PK
Alarm2
IF 1
OUT
IF 1
IN ATT ATT
CONTROLLER
PK LED 2
PK LED 1
PK
Alarm1
FIGURE 1.2 Block Diagram
1200-88 Manual, Rev. A Page 3 8/18/10

1.2 Technical Characteristics
TABLE 1.0 1200-88 Dual IF Amp Specifications (each amp)*
Input Characteristics
Impedance 50
Return Loss 18 dB
Frequency 0.1 to 100 MHz
Input Level -50 to 0 dBm
Input 1 dB compression +5 dBm @ min. gain
Output Characteristics
Impedance 50
Return Loss 18 dB
Output level +10 dBm, max.
Output 1 dB compression +15 dBm
Channel Characteristics
Gain range (adjustable) -25 to +25 dB (Front Panel Adjustable)
Frequency Response ±1.0 dB, 0.1-100 MHz; ±0.5 dB, any 20 MHz segment
Group Delay, max. ±2 ns, max. 0.1 to 100 MH
Controls, Indicators
Level Adjust pushbutton switches or REMOTE; setting shown on LCD display;
Set to -25 to +25 dB (+10 dBm max. out)
Level Peak Red LED lights when output level exceeds +13 dBm
Power Green LED
Remote Yellow LED
Alarm Red LED
Other IF Connector BNC (female)
Alarm/Remote Connector DB9 - NO or NC contact closure on Alarm; M&C 9600 Baud, RS232C
Size 19 inch, 1RU standard chassis 1.75” high X 16.0” deep
Power 100-240 ±10% VAC, 47-63 Hz, 45 watts max.
Options
Q RS-422/RS-485 Remote capability
Connector options see TABLE 2.2
*+10˚C to +40˚C; Specifications subject to change without notice
1200-88 Manual, Rev. A Page 4 8/18/10

1.3 Monitor and Control Interface
A) Remote serial interface
Protocol: RS-232C, 9600 baud rate, no parity, 8 data bits, 1 start bit, and 1 stop bit.
Connector: Rear panel, DB-9 male.
J10 Pinouts
Pinouts (RS-232C/422/485)
Pin Function
1Rx-
2 Rx+ (RS-232C)
3 Tx+ (RS-232C)
4Tx-
5GND
6 Alarm Relay: Common
7 Alarm Relay: Normally Open
8NotUsed
9 Alarm Relay: Normally Closed
B) Status Requests - Table 1.1 lists the status requests for the 1200-88 and briefly describes them.
Table 1.1 1200-88 Status R
e
equests
Requests
Command Syntax* Description
Command Status {aaS0} Returns {aaS0bbbcccddddeeeefg} where:
• bbb = GAIN 1 (range -25 to +25 dB)
• ccc = GAIN 2 (range -25 to +25 dB)
• dddd = LEVEL 1 (range <+5, +5, +6,..., +14, +15, >+15)
• eeee = LEVEL 2 (range <+5, +5, +6,..., +14, +15, >+15)
• f = 0 if NO CH1 peak alarm
= 1 if CH1 peak alarm
• g = 0 if NO CH2 peak alarm
= 1 if CH2 peak alarm
* PLEASE NOTE: The Address (aa) should only be used when RS-485 is selected.
1200-88 Manual, Rev. A Page 5 8/18/10

C) Commands Table 1.2 lists the commands for the 1200-88 and briefly describes them. After a command is
sent the 1200-88 sends a return “>” indicating the command has been received and executed.
General Command Format - The general command format is {aaCND...}, where:
{ = start byte
aa = address (RS-485 only - option Q)
C = 1 character, either C (command) or S (status)
N = 1-digit command or status number, 1 through 9
D = 1 character or more of data (depends on command)
} = stop byte
Table 1.2 1200-88 Comman
d
ds
Commands
Command Syntax* Description
Set GAIN 1 {aaC1xxx} where:
• xxx = 3 characters
• Range: -25 to +25
Set GAIN 2 {aaC2xxx} where:
• xxx = 3 characters
• Range: -25 to +25
Enable Remote #Just # sign
Disable Remote {aaCR0} {CR and zero}
* PLEASE NOTE: The Address (aa) should only be used when RS-485 is selected.
1200-88 Manual, Rev. A Page 6 8/18/10

2.0 Installation
2.1 Mechanical
The 1200-88 consists of one RF/Controller PCB housed in a 1 RU (1 3/4 inch high) by 16 inch deep chassis.
A switching, ± 12, +24, +5 VDC power supply provides power for the assemblies. The 1200-88 can be secured
to a rack using the 4 holes on the front panel. Figure 2.1 shows how the 1200-88 is assembled.
POWER
SUPPLY
FIGURE 2.1 Mechanical Assembly
1200-88 Manual, Rev. A Page 7 8/18/10

2.2 Rear Panel Input/Output Signals - Figure 2.2 shows the input and output connectors on the rear panel.
AC
GND
J18
AC - POWER IN
AC input for switching
power supply.
100-240 ±10% VAC, 47-60 Hz.
J2 - CH1 INPUT
0.1-100 MHz input,
-50 to 0 dBm
BNC female 50
J1 - CH1 OUTPUT
0.1-100 MHz output,
+10 dBm max
BNC female 50
J10
AND
MONITOR
CONTROL
J10 - MONITOR AND CONTROL
DB9 female connector.
see Table 2.1.
J4
INPUT
J5 - CH2 OUTPUT
0.1-100 MHz output,
+10 dBm max
BNC female 50
J4 - CH2 INPUT
0.1-100 MHz input,
-50 to 0 dBm
BNC female 50
CHANNEL 1
CHANNEL 2
J1
OUTPUT
15 234
678
9
J5
OUTPUT
J2
INPUT
FIGURE 2.2 Rear Panel I/Os
TABLE 2.1
J10 Pinouts (RS-232C/485*)
Pin Function
1Rx-
2 Rx+ (RS-232C)
3 Tx+ (RS-232C)
4Tx-
5GND
6 Alarm Relay: Common
7 Alarm Relay: Normally Open
8NotUsed
9 Alarm Relay: Normally Closed
*Remote Serial Interface
Interface: DB-9 Male
Protocol: RS-232C (RS-232C/422/485 -option Q),
9600 baud rate, no parity, 8 data bits, 1 start bit, 1 stop bit.
1200-88 Manual, Rev. A Page 8 8/18/10
TABLE 2.2
2.2 Connector Options
Option IF
STD BNC, 50
-B BNC, 75
-F Type-F, 75

2.3 Front Panel Controls and Indicators - Figure 2.3 shows the front panel controls and indicators.
MENU
EXECUTE
Gain 1 = -10
ALARMCH2
PEAK
CH1
PEAK POWER
LCD DISPLAY
Display shows Gain in dB and
output level ±1dB in dBm.
S1 - MENU/EXECUTE BUTTON
Press this to get into Program mode
and to execute any changes.
DS3 - CH1 PEAK LED
Red LED indicates CH1
output level exceeds
+13dBm.
DS6 - POWER LED
Green LED indicates
presence of DC power.
DS1 - CH2 PEAK LED
Red LED indicates CH2
output level exceeds
+13dBm.
S2 - VERT. TOGGLE
Vertical toggle switch that controls
values in the Menu items when in
program mode. Does not function in
the normal display mode
S3 - HORIZ. TOGGLE
Horizontal toggle switch that
controls which values are being
adjusted. Does not function in the
normal display mode
REMOTE
Gain 2 = +10
DS5 - REMOTE LED
Yellow LED indicates
remote operation.
DS2 - ALARM LED
Red LED indicates
alarm.
FIGURE 2.3 Front Panel Controls and Indicators
1200-88 Manual, Rev. A Page 9 8/18/10

2.4 Operation
2.4.1 Installing and Operating the 1200-88 Dual IF Amplifier
1. Connect -50 dBm to 0 dBm signals to CH1 IF In, J2, and CH2 IF In, J4 (Figure 2.2)
2. Connect the IF OUTPUTS, J1 and J5, to the external equipment.
3. Connect 100-240 ±10% VAC, 47 - 63 Hz to AC on the back panel.
4. Set the gain for -25 to +25 dB on each channel for a maximum output level of +10 dBm for each
channel. (See Section 2.5 Menu Settings).
5. Be sure DS6 (green, DC Power) is on and DS2 (red, Alarm) is off (Figure 2.3).
6. To insure that CH1 and CH2 amplifiers are not being overloaded check that CH1 PEAK and CH2
PEAK LEDs, DS3 and DS1, are off (Figure 2.3).
7. AC Fuse- The fuse is a 5 mm X 20 mm, 2 amp slow blow (Type T) and is inserted in the far slot in the
drawer below the AC input as shown in Figure 2.4. There is a spare fuse in the near slot. If a fuse
continues to open, the power supply is most likely defective.
FUSE DRAWER
SPARE FUSE DRAWER
AC Fuse - 5 amp slow blow (Type T),
5 mm X 20 mm
~
INPUT
100-240± 10%VAC
47-63 Hz
2A MAX
FUSE
TYPE T 2A GDC
250 VOLT
FOR 100 - 240 V~
~
FIGURE 2.4 Fuse Location and Spare Fuse
1200-88 Manual, Rev. A Page 10 8/18/10

2.5 Menu Settings
2.5.1 Functions
This section describes operation of the front panel controls. There are three operator switches, the
LCD display and alarm indicator LEDs. All functions for the equipment are controlled by these components.
The functions are (see Figure 2.5):
Power Up
Normal Display
Menu 1 Gain 1 (-25 to +25)
Menu 2 Gain 2 (-25 to +25)
Menu 3 Set Unit to Remote Operation (NOTE: the local controls still function when in REMOTE)
Menu 4 Set Remote Mode (option Q)
Menu 5 Set RS-485 Address (option Q)
Alarm indications appear on the LEDs (see figure 2.3).
All program changes must start with the operation of the Menu/Execute switch and must also end with the
operation of the Menu/Execute switch verified by the “Save Settings?” Menu. If this sequence is not followed,
none of the changes will take effect. If programming is initiated and no operator action takes place for
approximately 12 seconds (before the final press of the Menu/Execute switch) the display will revert to its
previous status and you will need to start over.
2.5.2 Power On Settings
NOTE: THE LAST STATUS OF A UNIT IS RETAINED EVEN WHEN POWER IS REMOVED.
WHEN POWER IS RESTORED, THE UNIT WILL RETURN TO IT'S PREVIOUS SETTINGS.
When power is first applied, the LCD display goes through three steps.
1. The LCD goes black to show all segments are functioning.
2. The software version will be displayed.
REV 1.00
3. The present gain of the Dual IF Amp is shown.
G1=-10 LVL1=<+5
G2=+15 LVL2= +12
The unit is now operational and ready for any changes the operator may desire.
1200-88 Manual, Rev. A Page 11 8/18/10

2.5.3 Control Switches
1. Menu/Execute - Any change to the programming of the unit must be initiated by pressing
the Menu/Execute switch and completed by pressing the Menu/Execute switch.
2. Horizontal Switch - This switch is mounted so its movement is horizontal and moves the cursor
left or right.
3. Vertical Switch - This switch is mounted so its movement is vertical and has two functions:
a. During gain changes, the vertical movement will raise or lower the number in the direction
of the arrows.
b. For other functions such as Remote Mode, the vertical switch will cycle through the different options.
2.5.4 Gain Changes
When you get to this menu note that the gain changes will be made as you make them, and they will be saved
immediately. Press the Menu/Execute button until you get to the desired gain setting:
GAIN 1=-10
LEVEL1=<+5 R
Pressing the Up/Down switch to change the gain in 1 or 10 dB steps and then push the
Menu/Execute switch to get to the Gain setting:
GAIN 1=-20
LEVEL1=<+5 R
By using the horizontal rocker switch the cursor can be moved left or right .
GAIN 1=-20
LEVEL1=<+5 R
Pressing the Up/Down switch down will toggle the display digit selected until you have the desired gain.
NOTE: THE GAIN WILL BE CHANGED AND SAVED AS YOU ADJUST THE NUMBERS.
When the display indicates the value desired you can push the Menu/Execute switch to the next item OR
you can scroll to “R”, push the Menu/Execute switch to get back to the main display:
G1=-20 LVL1=<+5
G2=+15 LVL2= +12
Figure 2.5 gives the menu items and how to make changes.
1200-88 Manual, Rev. A Page 12 8/18/10

2.5.5 Alarm Indications
An alarm condition will occur if the +12 VDC voltage that powers the amplifiers is lost. The CH1 and CH2
peak indicators will light when an output level of greater than +13 dBm is detected. The Remote LED will light
when the Remote mode is selected.
ON POWER UP
NORMAL DISPLAY
PUSHING MENU/EXECUTE SEQUENCE
REV 1.00
G1=+15 LVL1=+12
G2=-10 LVL2=<+5
REMOTE OFF
SCROLL <>
SCROLL
PUSH BUTTON
SCROLL <>
SCROLL
PUSH BUTTON
PUSH BUTTON
Power Up
Normal Display
Menu 1 Gain 1 (-25 to +25)
Menu 2 Gain 2 (-25 to +25)
Menu 3 Set Unit to Remote
Operation
Menu 4 Set Remote Mode
(option Q only)
Menu 5 Set RS-485 Address
(option Q only)
Select “R” in any of the above
menus to return to the main display.
GAIN 1= +15
LEVEL1= +12
GAIN 2= -10
LEVEL2= <+5
SCROLL <>
SCROLL
PUSH BUTTON
R
R
R
RS 232
SCROLL <>
SCROLL
PUSH BUTTON
R
ADDRESS = 00
SCROLL <>
SCROLL
PUSH BUTTON
R
FIGURE 2.5 Menu Display and Sequence
1200-88 Manual, Rev. A Page 13 8/18/10

3.0 Environmental Use Information
A.Rack-Mounting - To mount this equipment in a rack, please refer to the installation instructions
located in the user manual furnished by the manufacturer of your equipment rack.
B. Mechanical Loading - Mounting of equipment in a rack should be such that a hazardous condition
does not exist due to uneven weight distribution.
C.Elevated Operating Ambient Temperature - If installed in a closed or multi-unit rack assembly,
the operating ambient temperature of the rack may be greater than room ambient temperature.
Therefore, consideration should be given to Tmra.
D. Reduced Air Flow - Installation of the equipment in a rack should be such that the amount of air flow
required for safe operation of the equipment is not compromised. Additional space between unit
may be required.
E. Circuit Overloading - Consideration should be given to the connection of the equipment to the supply
circuit and the effect that overloading of circuits could have on over current protection and supply wiring.
Appropriate consideration of equipment name plate rating should be used when addressing this concern.
F. Reliable Earthing - Reliable earthing of rack-mounted equipment should be maintained.
Particular attention should be given to supply connections other than direct connection to the
Branch (use of power strips).
G. Top Cover - There are no serviceable parts inside the product so, the Top Cover should not be removed.
If the Top Cover is removed the ground strap and associated screw MUST BE REINSTALLED
prior to Top Cover screw replacement. FAILURE TO DO this may cause INGRESS and/or EGRESS
emission problems.
1200-88 Manual, Rev. A Page 14 8/18/10

CROSS TECHNOLOGIES, INC.
6170 Shiloh Road
Alpharetta, Georgia 30005
[phone]
FAX [phone]
Toll Free 888-900-5588
WEB: www.crosstechnologies.com
E-MAIL: [email protected]
Printed In USA
1200-88 Manual, Rev. A Page 15 8/18/10