Watkins-Johnson Company WJ-8718A/MFP Instruction Supplement page 52

INSTALLATION AND OPERATION WJ-8718A/MFP
The entire program is entered: wtb, 706, 1, 133, 2, 35, 3, 69, 4, 103, 5, 125, 7, 30.
Refer to Tables 2-19 and 2-22 to correlate the following discussion of each program entry.
"wtb" instructs the calculator to write binary entries for byte-serial transmission
on the bus.
"706" contains two addresses: 7xx is the calculator's IEEE interface module
address and the xx bits are the address code for the equipment on the bus with the calculator.
Receiveraddress is a binary number in the 0 through 15 range (Table 2-3); in this example,
address 06 has been assumed.
"1" is a register address.
Register 1 (001) contains the R/L, +/- BFO, and gain
mode data, plus the 2 0 and 2 1 bits of the MSD of the tuned frequency (BCD).
"133" is the decimal equivalent of the binary coded word 10000101, the data word
for the addressed register (1). The word is decoded: remote operating mode, manual gain
mode, and a tuned frequency MSD of 1 (1X.XXXXX MHz). The BFO sign is irrelevant because
the BFO is not applicable in the AM mode.
"2" is the address for Register 2 (010) which contains the 10 5 and 10 6 digits of the
tuned frequency in BCD format.
"35" is the decimal equivalent of binary 00100011, the data word for the addressed
register (2). The binary word represents BCD 23, the 10 5 and 10 6 digits of the tuned frequency
(X2.3XXXX).
"3" is the Register 3 (011) address. Register 3 contains the 10 3 and 10
4
digits of
the tuned frequency.
"69" is the decimal equivalent of binary word 01000101, the data word for the
addressed register (3). The word represents 45 in BCD or a tuned frequency of XX.X45XX.
"4" addresses Register 4 (100), the register for the 10 1 and 10 2 digits of the tuned
frequency.
"103" is the decimal equivalent of binary 01100111, the data word for the addressed
register (4).
In
BCD the word is 67 or a tuned frequency of XX.XXX67 MHz.
"5" is the address for Register 5 (101) which contains bandwidth and detection
mode data.
"125" is the decimal equivalent of binary 01111101, the addressed register (5) data
word. The word contains the codes for 1.0 kHz bandwidth and AM detection mode.
"7" addresses Register 7 (111), the RF gain mode register in command mode.
"30" is the RF gain code and needs no conversion because the RF gain is specified
as decimal entries from 0 through 255.
In summary, a remote command program consists of a string of decimal entries
alternating between register addresses and data. The parameter data, preceded by the register
address, can be entered in any order and parameters that are not to be changed are left out.
2-28