Band Decoder, Frequency Counter - Tokyo Hy-Power HL-1.5KFX User Manual

11-5 Band Decoder/ Frequency Counter
The band decoder will decode the various operating band information as issued by the major brands of
the radios (ICOM, Yaesu, Kenwood). Using the decoded signal, the amplifier will automatically
determine the frequency band of the radio.
From these three manufacturers, there are four kinds of band data used in their latest radio models, i.e.
DC voltage, 4-bit TTL, RS-232C, and serial data. The HL-1.5KFX is designed to be able to use any of
these methods, when the matched cable is connected.
The MPU also performs a frequency counting function. The RF drive signal from the transceiver is
sampled and divided by 16 (PC1675), this signal is then sent to the input of the MPU.
In the manual band select mode, if the frequency of the RF drive and band setting of the amplifier do not
match each other, the MPU will send a band miss-set signal which will force an amplification "halt"
command (shut down).
Additionally any RF measured between 26.0-28.0 MHz will immediately shut down amplifier
operation.
YA ES U
K ENW OO D
MA NU A L
BA NDA M P
ICOM
RX
K ENW OO D
TX
CI-V
YA ES U
TX PO W ER LI MITER
ICOM
ICOM
CI-V
RX
MA X1406
TX
BA NDD ATA
f [ MH z ] 1/ 16
Pre- Scal er
B AN D SE LE CT
B AN D DE CO DE
A/D
UP
MP U
PIC 18F8722
DO WN
f/ 16 [ M Hz ]
23
1. 9M Hz LPF
3. 5M Hz LPF
7M Hz LPF
10M Hz LPF
14M Hz LPF
18/2 1M Hz LPF
24/2 8M Hz LPF
50M Hz LPF