DRAKE R8A - Scan Functions contd.; SCAN A - B; Important Notes About Scanning

SCANA-B
An A - B scan allows continuous tuning of frequencies
between two programmed limits. Table 4 charts the tun-
ing step size and and display resolution for all models. If
the selected scan range includes the AM broadcast
band, the receiver automatically switches to a 10kHzstep
size (9 kHz selectable) while in the AM broadcast band
range.
To perform an A - Bscan, press [ * ],[:**] .
Result: A - B flashes and the frequency display changes to
show one of the current scan frequency endpoints. To
change this endpoint, enter a new frequency. To set the
second endpoint, press the a a | button. The
display now shows the other frequency endpoint. Entera
new frequency, if desired. To review the endpoints, press
the | or [| buttons.
Select method: SEEK or TIME
or CARRIER
Result: SEEK, TIME, or CARR lights in status area.
Select desired mode, bandwidth (BW), antenna, etc.
Adjust squelch to quiet receiver audio,
Press [5] ; (scan) flashes in status area when scan
is activated.
To adjust step rate: Press STEP and step size will
change as per table 5,
Display will indicate scanned frequency. Scanning can
be stopped or restarted with repeated depressions of the
button. Whenscanactionisstopped, the receiver will
be in the VFO mode.
Scan Functions cont'd. 24
To program a9 kHzstep rate for overseas broadcast band
reception-
Press POWER to turn receiver off
Hold TIMER/STEP function button
Press POWER to turn receiver on
9 kHz step in broadcast band is now programmed. This
setting is saved even if power is removed from the re-
ceiver, To change back to 10 kHz, repeat above steps,
Scanning Resolution Display Resolution
(Hz) (Hz)
|_ Mode |Detaut | Step | Step 2 [Deka | step! | Step 2]
USB, LSB,
CW.RITY,
AM, FM
AM
Broadcast
Band
(Cor 9kHz If programmed)
Table 5 Scan Tuning Rates
Important Notes About Scanning
To avoid impaired scanning action, it is recommended
not intermix HF with VHF channels, which imposes rapid
switching on the antenna select relay.
In all scanning modes the setting of the SQUELCH control
is important for proper scanning action. Due to atmos-
pheric noises alone, using a squelch control in the HF
spectrumis, atbest,a compromise. Amore exact method
of SQUELCH setting is provided here.
First, be sure the SQUELCH control is counterclockwise.
Next, adjust the RF gain control slowly counterclockwise
until the S METER reads the signal level desired to trip the
squelch circuit. Forexample, ifyouwantonlysignals = S-
7 or stronger to break the SQUELCH, rotate the RF GAIN
control until the S-METER Is reading S-7. Next, leaving the
RF GAIN control alone, advance the SQUELCH control
clockwise until the receiver audio just quiets. Finally,
advance the RF GAIN fully clockwise. The receiver is now
ready for accurate scanning.