Select:) Test Menu Branch; Test:) Carrier; Test:) Loopback - Comtech EF Data SLM-5650A Installation And Operation Manual

7.2.5

(SELECT:) Test Menu Branch

TEST: Carrier
LampTest
Select the Carrier, Loopback, BERT, or LampTest submenu. Press [ENT].
Carrier Test Modes, Loopback, and Tx BERT are not allowed when the
modem is set to Demod Only.
7.2.5.1

(TEST:) Carrier

Carrier Test Modes: Normal
Use the arrow keys to select Normal, Tx-CW, or Tx-1,0 then press [ENT].
Carrier Test Mode
Normal
TX-CW
TX 1,0
7.2.5.2

(TEST:) Loopback

Loopback Test Modes: Normal
Use the arrow keys to select Normal, IFℓ, or I/O1ℓ. Press [ENT].
Loopback Test Mode
Normal
IFℓ
I/01ℓ
Front Panel Operation
Loopback BERT
Tx-CW
Tx-1,0
Description
Not a test mode:
Select for standard modem operation.
The modulator produces a pure carrier that can be used for frequency and power
measurements.
The modulator produces an offset (single upper side band suppressed) test carrier. Use this
test mode to check for quadrature error in the modulator.
IFℓ
Description
Not a test mode:
Select for standard modem operation.
IF Loopback:
Loops the output of the modulator back to the demodulator (inside the modem) to
verify transmit and receive configurations match as well as the data inputs and
outputs.
Baseband Loopback:
Loops the transmit data (after the interface) back to the receive data path
interface. This mode is useful for checking interface cabling and clocking.
7–43
(E)
(E)
I/O1ℓ
(E)
SLM-5650A Satellite Modem
Revision 10
MN-SLM-5650A