User's Manual

EX7100 Technical Manual – Monitoring and Diagnostics
©1999 Exicom Technologies (1996) Ltd 4-11 Issue 1 - February 2001
The ‘CW’ mode provides a carrier output only. This enables the user to verify the
transmitter operating frequency using a standard frequency counter.
The ‘DSBSC’ mode provides a double side band, suppressed carrier output, to enable the
user to adjust the transmitter carrier null, and also to measure Transmitter RF Power
(PEP).
1) Align Mode cannot be accessed if the link is established or the Transmitter is on.
Ensure this is not the case by setting the Terminal’s Operating Mode to “On-
demand”.
2) From idle, press ‘Enter’
Use the arrow keys to enter the First Level
password ‘1111’ and then press ‘Enter’.
3) Use the up and down arrow keys to make
sure the →
→→
→ is next to Controller and then
press ‘Enter’
4) Use the up and down arrow keys to make
sure the →
→→
→ is next to Align Mode and then
press ‘Enter’.
5) Use the keypad to select the required
modulation and Tx power level, then press
‘Enter’.
6) Press ‘Escape’ to disable and exit out of
Align Mode.
Key: MOD = Modulation.
CW = Carrier only.
DSBSC = Double side band at +/- 8kHz from carrier.
Tx = Transmit power level.
Low = Set to lowest menu setting.
Normal = Set to current user setting.
4.5.2 Digital Loopbacks
The EX7100 is able to loopback the 64kbps digital data in the following configurations:
Figure 4.3: Digital Loopback Configurations
→Controller
Rf Parameters
S/w version
→Align Mode
→mod: ∗ cw dsbsc
tx: ∗ low norm
Password ∗ ∗ 1 ∗
↑
Framer
Transmit RF
Received RF
Received Data
Transmit Data
EX7100
Local Loopback
Remote Loopback
RF Section