Textron Greenlee Communications DataScout 10G, User Manual

Page: 63 / 115

Users Manual
DataScout 10G & 10Gx
61
2. Use the Loop Start/DID pull down to select SS.
3. Ensure SS Dial mode is from the pull down menu to the right of the phone#
box.
4. Enter 2 or 3 digits in the phone # box using the pop up keyboard. For testing
purposes the test set allows any number of digits to be dialed.
5. Press the Dial button to transmit the digits out the Tx of the 4-Wire port.
Receiving SS digits:
1. Configure the test set for Selective Signaling (SS) by selecting 4-Wire Signaling
under the 2/4 Wire pull down menu (upper left).
2. Use the Loop Start/DID pull down to select SS.
The test set is now ready to receive SS digits on the 4-Wire RX port and will be dis-
played in the receive digit window. Up to 20 digits can be received then you must exit
and re-enter SS mode to capture additional digits.
Return Loss (RL)
– Tx Complex Tones
Return Loss is a ratio difference in a transmitted power and the power reflected from a
discontinuity and is displayed in dB. Return Loss is typically used to measure the im-
pedance match between the circuit under test and a selected termination of 600
Ω,
900
Ω or 1200 Ω.
Return loss uses three bands:
►
ERL(Echo Return Loss) transmits frequencies from 560Hz to 1965Hz
►
SRL-Hi (Singing Return Loss High) transmit from 2200Hz to 3400Hz
►
SRL-LO (Singing Return Loss Low) transmit from 260Hz to 500Hz with a
transmit output level between -6dBm and -10dBm
Poor return loss is typically in the single digit range. The higher the number the better
the return loss and impedance match.
To test Return Loss press the Tx Complex button and select the desired band. The
return loss ratio will be displayed in dB next to the RX.
To turn off Return Loss (RL) press the Tx Complex button and select Off.
Measurements
Voltage & Current
Voltage measured across TIP & Ring along with current draw is displayed in the upper
right of the LCD. If no voltage is detected (less than 1V)
No CO line is displayed. Cur-
rent is measured in an Off-Hook condition and is displayed in mill-amperes (mA).
RCV
frequen-
cy