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04 Format
The 04 format transmits trace amplitude information only as a binary number. The binary number is one 8-bit byte
composed from the bytes established with the 02 format.
The 04 output is the fastest way to transmit trace date from the spectrum analyzer to the HP-IB bus. However, sign
information is lost. Keep this in mind when transmitting delta marker information (MKD). The end of data trans-
not
mission is
marked by a carriage-return/line-feed.
Format Statements and the HP-IB Bus
The table below shows a transmission sequence on the HP-IB bus for each of the four formats. Each format is
transmitting the amplitude of a marker positioned at the - 10 dBm reference line.
Format
Byte
Byte
Carriage Return
Line Feed
(EOI asserted)
Though the spectrum analyzer transmits either binary or digital information on the HP-IB bus, a decimal number is
always returned to the controller display. This is illustrated in the program below, which reads the instruction word
1040 at display address 8, the fist memory location of trace A. The program reads the instruction word, using
each of the formats, and the DR command.
ASSIGN @Sa TO 7 18
1
2
PRINTER IS 701
4
OUTPUT @Sa;"Al;SB;TS;"
10
OUTPUT @Sa;"DA 0 01 DR"
20
ENTER @Sa;Drl
30
OUTPUT @a; " DA 0 02 DR"
40
ENTER @Sa USING "# W":Dr2
o o o o x x x x x x x x x x x x 0 2
11 //////
x x x x x x x x
01
0 3
NUM (-)
NUM ("1")
NUM (1)
NUM ("@",
NUM ("!d")
NUM ( )
NUM ("1")
13
10
13
10
FORMATSTATEMENTS
(Continued)
0 4
0 2
0 4
P r o g r a m m i n g 1 1 7
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