Ten-Tec RX-340 Technical Manual page 41

4-6 MODE ← → buttons: The Mode ← → switches are used to step though the
receiver's detection modes. The Mode menu is circular, and may be stepped through
from either direction. A total of eight detection modes are available on the RX-340:
AM: Amplitude Modulation
SAM: Synchronous AM, selectable sideband
USB: Upper Sideband
LSB: Lower Sideband
ISB: Independent Sideband, selectable sideband
CW: Continuous Wave, variable BFO
CW1: Continuous Wave, 0-Hz Offset
FM: Frequency Modulation
Detection-mode is displayed in the main display window directly above the Mode ← →
switches. Audio from upper, lower, or both sidebands may be selected in ISB and SAM
modes (See section 4-12). The SAM detector must be locked onto the carrier of an
incoming AM signal in order to provide Synchronous AM reception. Lockup is indicated
when periods punctuate the mode-display:
S.A.M. (locked) vs. S A M (unlocked)
When locked, the sideband containing less interference may be selected by the AF
channel switch. Normal AM reception occurs when the detector is unlocked. Minimum
SAM bandwidth is 4 kHz. Note that the Mode ← → buttons restore Mode display for
inspection or editing whenever the main display is overwritten by Mute (after a software
Mute command). Only inspection is possible in Remote mode. Return to Local mode to
edit the mode setting (and reset the Mute condition).
4.7 BITE buttons: The RX-340 features a Built-In Test Equipment (BITE) mode which
is used to conduct various internal self-diagnostic procedures. To place the receiver in
BITE mode, press both Mode ← → switches simultaneously. The main alphanumeric
display will then present the message 'ENTER BITE LEVEL'. Pressing a designated
keypad digit (1, 2, 3, etc.) initiates the specific test-level sequence you wish to conduct.
See section 5-7 for a full description of RX-340 self-diagnostic capabilities and
procedures.
4-8 ↑/+ and ↓/- buttons: The ↑/+ and ↓/- buttons are located in the upper left-hand
quadrant of the receiver's keypad:
4-3