AMERITECH AM8a, Instruction Manual

Page: 81 / 152

Meter Display (18-0037) AM8a Instruction Manual
February 10, 2000 0037-S06.L_
6-12
6.6.4
RX1 Tone or RX2 Tone:
These selections are used to measure Level and Frequency of
Tones present on the selected channel of the
PCM1 RX
or
PCM2 RX
input jack. The
Level is displayed in dBm and the frequency is displayed in Hz. A measured value of
"
UNDER
" in the Level display indicates the measurement is lower than the acceptable
limit. (dBm < -40).
6.6.5
RX1 dBdsx or RX2 dBdsx:
These selections are used to measure the received bipolar
amplitude of the
PCM
signals from the
DSX
bay at the
PCM1 RX
or
PCM2 RX
jack. The
measured value is dependent on the Test Set
MODE
of the AM8a as described in 6.6.6
and 6.6.7.
6.6.6
RX1 dBdsx or RX2 dBdsx in Emulation Mode:
When in
EMULATE
, the
PCM1
or
PCM2 RX
jack is connected to the
RX
jack at the
DSX
. The measurement will have zero gain
compensation added to the measurement.
6.6.7
RX1 dBdsx or RX2 dBdsx in Monitor Mode:
When in
MONITOR
, the AM8a
PCM1
or
PCM2 RX
jack is connected to the
DSX
Monitor jack. The measured value will have a
gain compensation added to compensate for the signal attenuation of the 430
Ω
resistors
in the
DSX
monitor jack.
NOTE:
This applies also to measurements made while in a Drop & Insert
Configuration (Rpt 1 to 2 or Rpt 2 to 1) since Drop & Insert also must
have both
RX
jacks connected to the Monitor jacks of the
DSX
.
6.7 NOISE MEASURE
This
MEASURE
display is available for all Trunk types.
NOISE 65 dBrn
INPUT TX FILTER
CMSG
The display measures the Idle-Channel Noise between Tip and Ring of any selected
LOOP
,
RX
or
TX
jacks, except for
PCM
. On
PCM
, the measurement is made internally on any of the 24
selectable
TX
or
RX
channels.