Test Setup (Connectors) - Wavetek TETRA MS Test Operating Instructions Manual

General Preparations

Test Setup (Connectors)

Levels of less than –110 dBm may appear when testing (eg receiver measure-
ments), so the entire setup must be proof against EMI pickup and not radiate any
either. The following measures are recommended for this purpose:
•
Use a double-shielded RF cable between the STABILOCK test set and the
mobile.
•
Terminate the RF DIRECT socket of the STABILOCK with 50 Ω while not in
use.
•
Make sure that all plug-ins of the test set (back panel) are screwed in tightly.
•
Close vacant plug-in slots on the test set (back panel) with dummy panels.
4032 STABILOCK
UNIVERSAL ANALOG/DIGITAL COMMUNICATION TEST SET
INTENS
S4
S1 S2 S3
DUPLEX dB REL BEAT DF
RX SINAD
TX VOLT DIST
20 dB
RF
DIRECT
RF
50
MAX EM F EM F
MAX
0,5 W
<2 V <2 V
Fig. 10.2: Test setup with TETRA mobile station (handset and transceiver). The test
adapter is not necessary for the described tests. The test adapter couples out the
microphone signal and the loudspeaker signal so that the usual analog tests can also be
performed on TETRA mobiles (e.g. SINAD).
"
Use the supplied BNC/BNC cable (382 678) to connect socket
Bu 103 of the IF unit (back panel) to socket Bu 103 of the D-AMPS
unit (see appendix: "Connectors on the rear"). Without this con-
nection no call can be set up to the mobile.
For other TETRA-specific connectors (eg synchronization port)
see section "Connectors on the rear" in the appendix of this
TETRA manual. For generally available connectors and functions
(eg AF signal generator and analyzer), see chapter 4 of the
STABILOCK manual.
8
7 9
FREQU
6
4 5 UNIT/SCROLL
LEVEL
1 2 3
MOD FREQ
.
0
FM AM OM
STEP
SCOPE ANALYZER MEMORY AUX PRINT
S6
S5
RX MOD
GEN A B/SAT EXT
CCITT VOLTM DEMOD MOD GEN
600
600 600
DEMOD
VOLTM
MOD GEN
M AX 30 Hz MAX
600 0...20 kHz RL > 200 8 Vpp 0...20 kHz
20 V 30 kHz
TETRA MS Test
REMOTE MEMORY
CARD
ENTER
OFF
+
-
POW ER
ON/OFF
HELP CLEAR
SCOPE INPUT
POS
AC DC
0...20 kHz
1 M
10
10-9