AM8a Instruction Manual (18-0037) Meter Display
0037-S06.L_43 February 10, 2000
6-9
6.5 E & M and SF – ANALOG MEASURE
For E & M the measurements described in sub-sections 6.5.1 through 6.5.5 are made at the E &
M jacks labeled TX/2W, RX, E/M and SB/SG on the front panel. For SF only the TX and RX
jacks and measurements apply. Use as many 48–0047, 48-0048, or 48–0062 cables as are
needed. The DC and AC MEASURE selections described are listed below in the order presented
(beginning at top of left column) as the MENU up key is pressed:
Description of Measurements
TX Tone transmit tip-ring tone (dBm and Hz)
RX Tone receive tip-ring tone (dBm and Hz)
TX Vt-r dc TX Vt-r ac transmit tip-ring voltage
TX Vcm dc TX Vcm ac transmit tip & ring common mode
RX Vt-r dc RX Vt-r ac receive tip-ring voltage
RX Vcm dc RX Vcm ac receive tip & ring common mode
Ve dc Ve ac E-lead tip-ground voltage
Vsg dc Vsg ac SG-lead ring-ground voltage
Vm dc Vm ac M-lead ring-ground voltage
Vsb dc Vsb ac SB-lead tip-ground voltage
6.1.1 TX Vt-r or RX Vt-r, dc or ac: These selections connect the meter across the Tip and Ring
leads of the E & M TX/2W or RX jack. DC measurements result in the voltage displayed
numerically as well as on the bar graph. AC measurements display the voltage
numerically and graphically, and also give a frequency measurement.
6.5.2 TX Vcm or RX Vcm, dc or ac: These selections measure the voltage difference or delta
between the Tip and Ring leads (∆V) of the E & M TX/2W or RX input jack. The
differential voltage measured is referenced to CO ground which must be connected to a
binding post on the rear of the unit.
6.5.3 Ve or Vm, dc or ac: These selections place the meter across the E or M lead with
reference to the Ground supplied on the sleeve of the E/M input jack. DC
measurements result in the voltage displayed numerically as well as on the bar graph.
AC measurements display the voltage numerically and graphically and also give a
frequency measurement.
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