External Reference Input Connector; 70/140 Mhz (If) Output Connector; Configuring The Modulator For Best Performance; Bringing The Modulator Online - Advantech L-Band Satellite Modulator Installation And Operation Manual

Table 2.11: 1PPS Input Connector
Item
Connector type:
Connector designation:
Pin-outs:

External Reference Input Connector

2.6.9
One connector is provided to receive an external reference signal. For signal specification, see
Appendix A: Technical Specification.
Table 2.12: Ext Ref In Connector
Item
Connector type:
Connector designation:
Pin-outs:

70/140 MHz (IF) Output Connector

2.6.10
One IF output connector provides an IF output. For signal specification, see Appendix A:
Technical Specification.
Table 2.13: 70/140 MHz (IF) Output Connector
Item
Connector type:
Connector designation:
Pin-outs:

Configuring the Modulator for Best Performance

2.7

Bringing the Modulator Online

2.7.1
When bringing a transmit carrier on line, the following sequence must be followed:
1. Power on the modulator for five minutes to allow the oscillator to stabilize.
2. Before connecting the L-band cable to the BUC, verify that:
The Symbol rate and the frequency of the modulator are correctly set
SBD75e Series Modulator Installation and Operation Manual
Specification
BNC 50 Ω socket
1PPS IN
Centre Video Signal
Shield Ground/Chassis
Specification
BNC 50 Ω socket
EXT_REF_IN
Centre Video Signal
Shield Ground/Chassis
Specification
BNC 50 Ω socket
70/140 MHz OUT
Centre Video Signal
Shield Ground/Chassis
Installation
2-13