Yaesu FT-1000 Operating Manual page 18

3. Controls & Connectors - Top Access Panel Controls
Top Access Panel Controls
PKT_RITY
(1) VOX GAIN
This control sets the gain of the VOX (voice-ac-
tuated transmit/receive switching) circuit, to set the
level of microphone audio needed to activate the trans-
mitter during voice operation while the VOX button on
the front panel is depressed,
(2) VOX ANTI-TRIP
This control sets the level of negative feedback of
receiver audio to the microphone, to prevent receiver
audio from activating the transmitter (via the micro-
phone) during VOX operation. Adjustment is described
in the Operation chapter.
(3) VOX DELAY
This control sets the hang time of the VOX circuit,
between the moment you stop speaking (or open the
CW key during semi break-in operation) and the auto-
matic switch from transmit back to receive (during
VOX operation). Adjust for smooth VOX or semi
break-in operation (so the receiver is activated only
when you want to listen).
(4) FM MIC GAIN
During FM operation, this control adjusts the mic-
rophone gain (and transmitter deviation). More clock-
wise settings produce a wider bandwidth signal.
NOTE: This control has been preset at the factory to
produce the correct deviation with standard micro-
phone levels. A deviation meter should be connected
for proper readjustment, as it is difficult to determine
the proper setting by ear.
(5S) WEIGHT DIP Switches
These DIP switches select the weight (dot:dash
ratio) of the internal electronic CW keyer, between 1:3
page 16
and 1:4.5. Selection is made by setting the switches for
a binary number between 0 and 16, as shown below.
Keyer Weight Settings
(6) PKT RTTY DIP Switches
The two leftmost switches (1 and 2) of this set select
the offset of the display and IF passband center from
the BFO, to match most common packet tncs used for
300-baud hf packet operation. To set these switches,
determine which AFSK tones are used by your tnc, and
then set the switches to match as shown below.
Packet FSK Tone Pairs
The remaining switches in this set select the func-
tion of the internal AFSK generator for RTTY trans-
mission. Switches 3 and 4 select the RTTY shift, switch
5 selects either normal (low Mark) or reversed tones,
and switch 6 selects either a 2125-Hz or 1275-Hz Mark
tone. See the table below.
RTTY DIP Ses
| ate fo || Rv [0 | rete | 0 |
| scone | - | 0 |
Nor: LSB Keydown = Mark Tone
Rev: LSB Keydown = Space Tone