Comet Antenna CAT-283 User manual

Thank you for your purchasing our product. This product is made under the stringent quality control. Should
there be any breakage in transit, please do not hesitate to contact the shop you purchased this product.
For your safety, read this manual carefully for proper handling and operation before using.
Precautions for using
●Keep the transmitting power at 10W or less to protect a transceiver from the reflected power.
●Do not input 250W or more, otherwise it causes a serious damage.
●Tune the antenna first in case the antenna SWR is outside 15-200.
●Never attempt to apply 15V or more to External Source Terminal. Failure to follow this might cause
breakdown.
●Appearance & Components
①Display Meter For indicating FWD, REF and SWR.
②TR TUNE (430MHz) Variable Capacitor for Impedance on the transceiver side.
③X TUNE (430MHz) Variable Capacitor for Impedance on the Antenna side.
④Power Range button for changing the max power of FWD.
⑤AVG/PEP Switch AVG reads Average Voltage and PEP reads Peek Envelop Power.
⑥TR TUNE (144MHz) Variable Capacitor for Impedance on the transceiver side.
⑦X TUNE (144MHz) Variable Capacitor for Impedance on the Antenna side.
⑧ANT Connector SO-239 type Connector for the Antennas or Dummy Loads.
⑨TR Connector SO-239 type Connector for the Power of Antenna
⑩External Source Terminal For connecting Stabilized Power Supply for Display illumination.
Features
●CAT-283 covers a freq range 144MHz/430MHz. It handles up to 250W. The built-in
duplexer helps tuning of each 144/430MHz separately.
●Cross Needle Display shows FWD, REF and SWR simultaneously. Also, separate meter
for convenient placement.
●Beautifully illuminated when connected to the power supply.

○
C
○
B
○
A
●How to connect
Connect 50Ω Coax cable, such as 3D2V or 5D2V etc., to TR Connector, according to the above fig. Also,
connect a coax cable for Antenna to ANT Connector.
* In case you use a dual band antenna, both frequencies are available at one terminal.
●Specifications
Frequency Range : 125~210MHz / 400~450MHz
Input Impedance : 50Ω
Output Impedance Range : 15~200Ω
Max. Input Power : 250W (FM)
Min. Power for SWR measurement : approx.6W
Tolerance : +/- 10% at full scale
SWR Range : 1.0 ~ ∞
Connector : M-J type (SO-239)
Power for illumination : DC 11~15V approx.250mA
Dimensions : (W) 218 x (H) 93(98) x (D) 120(152) [mm]
Weight : approx. 1.4kg
●How to use
Follow the below procedure.
1. Keep the power of transceiver 10W or less.
*Turn up the power gradually once the antenna and transceiver match.
Switch the Power Range either 30 or 60W, according to the power of transceiver.
Operation outside the power range might cause serious damage.
2. For 144MHz, turn ○
6and ○ 7switch to tune. For 430MHz, turn ○ 2and ○ 3switch to tune. Refer to the
below chart. *The below chart is the data at 50.
3. ○
Aindicates Traveling Wave and ○ Bindicates Reflected Wave while transmitting.
○
Cat ○ Aand ○ Bindicates SWR. (Fig.A)
4. Turn “TR Tune” and/or “X Tune” switch to minimize the value of ○
C
Fig.A
Appearance and specifications are subject to change without notice.
144/430MHz
Transceiver
Fig. Connection
Diagram
144/430MHz
Mono-Band or Dual-Band
Antenna
Copyright (C) 2010 COMET CO.,LTD.All Rights Reserved.
COMET CO.,LTD.
336-0026 Japan
4-18-2, Tsuji, Minami-ku, Saitama City, Saitama-Pref
TEL: [phone] , FAX: [phone]
URL http : //www.comet-ant.co.jp