Input Signals; Console - Symmetricom 8040C User Manual

Table 2: Factory Settings for Standard Outputs
BNC #
1
2
3
4
5
6
7 –12

Input Signals

The 1 PPS IN connector takes a 1 PPS input from an external source, such as a GPS
receiver or Cesium frequency standard, which is then used to discipline the 8040C's
Rubidium oscillator. See Disciplining to External 1 PPS on page 8.

Console

The RS-232 connector on the 8040C/8040CLN's back panel provides a command line
interface to perform the following tasks:
 Adjust the Rubidium oscillator's frequency

Synchronize to an external 1 PPS input
Table 3. RS-232 Connector Pin-Out
DB9-F
3
2
5
Note: Requires a null modem cable (DTE).
15254-201.docx
Signal
10 MHz Sine wave
10 MHz Sine wave
10 MHz Sine wave
5 MHz Sine wave
1 MHz Sine wave
1 PPS
Optional. Not included in the base configuration
Function
TX (Transmit Data)
RX (Receive Data)
GND (Signal Ground)
6
Rev. C, 07/12/2011