EXFO FTB-800 Series for FTB-1 - Manual (Page 217)

Test Setup - Test Configurator, Timer, and System
NetBlazer 207
Signal - Signal Configuration (DSn/PDH)
Tone (Hz) allows the selection of a tone for digital milliwatt testing.
The signal output power, when converted to analog, is 0 dBm. Choices
are 1000 Hz and 1004 Hz (default). The selected Tone applies to all
timeslots set to Tone.
Idle uses the Idle code byte from the Idle field. Choices are 00 to FF.
The selected Idle code applies to all timeslots set to Idle. The default
setting is 7F.
Note: The timeslots set to Idle or Tone can be changed from Idle to Tone and vice
versa even when the test is running; the Idle and Tone values can also be
changed.
Binary allows either displaying the Idle code values in binary (when
selected) or in hexadecimal (default).

RX
Apply Channel TX to RX, available for decoupled test, allows to apply
the RX payload content based on the TX settings. None will be used
when TX is set to either Idle or Tone.
Note: The RX timeslot selection is only configurable in a Decoupled topology
when the Apply Channel TX to RX check box is cleared. A warning is
displayed when the number of Pattern timeslot does not match between TX
and RX. This is to ensure pattern continuity between the TX and RX
interface in a MUX/DEMUX test even if used through a cross-connect device.
Select the payload content by tapping once or several times on each
timeslot until the desired content appears.
Pattern (default) uses the pattern from the received signal.
None does not use the pattern.