User's Manual

Table Of Contents

G3S-800-180-029 Installation & Service Manual

044-05112 Rev. A 2-5 April 2002

Table 2-4 Amplifier Module DC and Logic Connector Definition

Pin Function Description

A1 Power Input +27 Vdc (Power Contact)

A2 Power Input +27 Vdc (Power Contact)

A3 Ground Ground (Power Contact)

A4 Ground Ground (Power Contact)

1 RS485 +TxD Serial Communication Data Out

2 RS485 +RxD Serial Communication Data In

3 Service Loop TTL input to Amp. Gnd. for special test mode (Note 1)

4 MCPA Disabled

(Summary Fault)

TTL signal normally low indicates MCPA enabled. A high level indi-

cates that the MCPA has been disabled. Over Power, Over Voltage

takes one second to activate the signal.

5 Mod Addr 0 TTL input to Amp. Gnd. supplied by shelf to identify slot.

6 Mod Addr 1 TTL input to Amp. Gnd. supplied by shelf to identify slot.

7 TP1 TTL output. Future test point.

8 Manual Download GND to download manually

9 DC on stat TTL output. High indicates Amp is powered on.

10 RS485 –TxD Serial Communication Data Out

11 RS485 –RxD Serial Communication Data In

12 SCL7 No connection

13 SDA7 No connection

14 FP Disable Output Output, GND if the front panel switch is in the OFF position; +5 volts

indicates the front panel switch is in the ON position.

15 FP RST Output, GND if the front panel switch is in the RESET position; +5 volts

otherwise.

16 GND Ground

17 Module Detect Ground potential. Informs the subrack that an MCPA is plugged in.

Note 1: Service loop grounded allows the MCPA to be enabled or disabled by the front panel

switch when not mounted in the shelf.

2-6.2 Amplifier Module RF Connector

The amplifier has separate RF connectors, which are used for the RF signal input and output.

The RF connections on the amplifier connector are made through two BMA female coaxial con-

nectors (figure 2-3) and are listed and described in table 2-5.

Figure 2-3 Amplifier RF Connector

Table 2-5 Amplifier RF Connector Definition

Pin Function Description

A1 RF Input BMA Coaxial Female, Radiall

A2 RF Output BMA Coaxial Female, Radiall