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1.2  Technical Characteristics

TABLE 1.1 1200-03 IF Processor Specifications

*

RX Input Characteristics
  

Impedance/Return Loss

50 

 /18 dB

Frequency   

50 to 90 MHz

Input Level Range/1dB

0 to -80 dBm / +5 dBm

RX Output Characteristics
  

Impedance/Return Loss

FDM RX 50

 / 18dB; DIG1, DIG2 RX 75 

/18 dB (with 

 5dB 

attenuation on each channel)

  

Output Level, nom/max

-35 ± 10 dBm / -10 dBm

Output Level Adjust

-35 to -65 dB ± 10 dB at -35 dBm nominal

 

RX IF Mon Output Level

-35 ± 10 dBm

RX Channel Characteristics
  

Gain, AGC

-35 to +45 dB range 

Frequency Response

±1.0 dB

TX Input Characteristics
  

Impedance/Return Loss

FDM TX 50

 / 18dB; DIG1, DIG2 TX 75 

/18 dB (with 

 5dB 

attenuation on each channel)

  

Frequency 

50 to 90 MHz

Input Level Range

-20 to +5 dBm

Input Level Adjust

0 to -30 dBm with 0 dBm in 

TX Output Characteristics
  

Impedance/Return Loss

50 

 /18 dB

Output Level Range/1dB

-50 to +5 dBm / +10 dBm

TX Channel Characteristics

Gain Adjustment

0 to -30 dB, each channel individually adjustable

  

Frequency Response

±1.0 dB

Group Delay

5 ns, max

TX Switch Characteristics

Isolation, Switch off

 60 dB

  

Isolation, Port to Port

 50 dB, all “ON” and 

 5dB attenuation on each channel

Switch Time

 10 ms

Controls, Indicators

Front Panel Controls

  

SW1, SW2, SW3

DIG1 TX, FDM TX, DIG2 TX switches (2PDT)

  

SW4

LOCAL/REMOTE switch (2PDT)

Front Panel Indicators

  

DIG1, FDM, DIG2

Green LED indicates DIG1 TX, FDM TX, DIG2 TX are “ON” 

  

OVERRIDE

Yellow LED indicates override of LOCAL control 

  

LOCAL

Red LED indicates SW4 set to LOCAL control 

  

DC

Green LED indicates power is supplied to the unit 

Front Panel Monitors

  

J1, J2

RX AGC Monitor, TX IF Out Monitor 

Other 

IF Connectors

BNC, female

Connector, Control

DB9, female

Size

19 inch standard chassis 1.75”high X 14.0” deep

Power 

 

100-240 ±10% VAC, 47 - 63 Hz, 30 watts max.

 

  

*+10 to +40 degrees C; Specifications subject to change without notice

1200-03 Manual, Rev. B 

 

Page 4

    

         01/08/09

Summary of Contents for 1200-03

Page 1: ...re 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 When ordering parts from Cro...

Page 2: ...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 spe...

Page 3: ...cts either REMOTE or LOCAL operation On the DB9 connector a closure to V will turn the corresponding transmit channels on A local override feature is included such that when the REMOTE LOCAL 2PDT swit...

Page 4: ...put Level Range 1dB 50 to 5 dBm 10 dBm TX Channel Characteristics Gain Adjustment 0 to 30 dB each channel individually adjustable Frequency Response 1 0 dB Group Delay 5 ns max TX Switch Characteristi...

Page 5: ...1200 03 Manual Rev B Page 5 01 08 09...

Page 6: ...ng 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 Appropriat...

Page 7: ...14 inch deep chassis An AC power supply provides 15VDC and 15VDC to the PCB The 1200 03 can be secured to a rack using the 4 holes on the front panel Figure 2 1 shows how the 1200 03 is assembled POW...

Page 8: ...eference 6 OVERRIDE IN Local Override Input 15 VDC V overrides LOCAL control and allows for REMOTE control 7 AGC OUT AGC Voltage Indicates current AGC gain see Table 2 2 8 V DC Voltage Reference 15 VD...

Page 9: ...OUT J104 Figure 2 2 and that the appropriate LED s DS1 DS3 Figure 2 3 is lit 7 Adjust attenuator pots R1 R2 R3 T1 T2 T3 as needed Clockwise rotation provides increased output level full clockwise 0 dB...

Page 10: ...mate input level and corresponding gain in AGC as Table 2 2 shows TABLE 2 2 Approximate AGC Vo oltage vs Gain and Input Level TABLE 2 2 Approximate AGC Voltage vs Gain and Input Le evel TABLE 2 2 Appr...

Page 11: ...NOLOGIES INC 6170 Shiloh Road Alpharetta Georgia 30005 770 886 8005 FAX 770 886 7964 Toll Free 888 900 5588 WEB www crosstechnologies com E MAIL info crosstechnologies com 1200 03 Manual Rev B Page 11...

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