Sage 930i, Operating Manual

Page: 41 / 236

© Sage Instruments 2000
9100-2930-02 01/31/00
Section III Front Panel Operation
Front Panel
Operation
3-22
T
1
R
1
TR SB/SG
E/M
PCM
No Sig
No AIS
No FAS
Alarms
MFAS
HDB3
CRC4
History History
1
2
1 2
R
x T
x
120
Ω
120
Ω
Analog
75
Ω
75
Ω
CAUTION
-48VDC
!
R
x T
x
Figure 3-1
E1 Configurator Panel
On 2-wire trunks this usually means making an end-to-end measurement with one test set supplying
1020 Hz from one end and the other test set measuring the S/N at the other end. On a 4-wire trunk, the
far-end can be looped back. In this case the 930i can generate a 1020 Hz tone at the appropriate level
and then measure the S/N ratio for the loop.
It is possible to set the relative zero for measurements in dB, using one weighting filter and then change
to another filter. The display will then show the measurement in one filter relative to the other. This
feature is particularly useful for measuring the quantization noise in PCM.
3-3 CONFIGURATOR PANEL
The E1 Configurator is the standard configurator for 930i units.
LEDs indicate status and errors on the E1 lines. These errors are:
No signal, AIS, No FAS, Alarms, MFAS HDB3, and CRC4.
The 4 bantam jacks labelled 1 and 2 are the Tx (Transmit) and Rx
(Receive) jacks for connection to PCM1 and PCM2 at 120 Ohms.
The 4 BNC jacks are the corresponding jacks for connection at 75
Ohms via coaxial cables.
The four bantam jacks located at the bottom of the configurator are
used for connection to metallic trunks. The analogue jacks are: TR
(Tip/Ring), T1R1(Tip1/Ring1), SB/SG, and E/M.
3-3.1 TEST CORD CONNECTIONS
You can connect the 930i to trunks under test in one of 2 ways: through test cords plugged in to the front
panel jacks, or through wire wrap connectors attached at the Analogue and PCM rear panel access
ports located at the back of the test set.
Test Cord Connections for a 2-Wire Loop Start Trunks
Connect a 2-wire loop start, ground start, or reverse battery trunk to the 930i at the Bantam jack labeled
TR (located on the bottom left of the configurator)
Test Cord Connections for 4-Wire Trunks
Connect a 4-wire trunk to the 930i at the Bantam jacks labeled TR and T1R1. (located on the bottom
left of the configurator)
If the trunk is an E&M trunk, the E&M test cord must be connected at the Bantam jack labeled E/M for
Type I. (located on the bottom left of the configurator)
If E&M Types II through IV are being tested, the signal battery/signal ground leads must be connected
at the Bantam jack labeled SB/SG. (located in the bottom center of the configurator)
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