Anritsu ML2430A operation manual Offtbr, Offtbu, Val Bytes

ML24XXA NATIVE COMMANDS GPIB OPERATION

Returned

String: OFFTBL <s>,<val>

OFFTBR Output an offset table SENSOR

Syntax: OFFTBR <val>

val: 1 to 5

Remarks: Outputs the selected offset table. The returned string is constructed as fol- lows:

OFFTBR #<length><number_of_bytes>,<element1<element2><ele- mentn>

Where <length> is the character size of the <number_of_bytes> field and <number_of_bytes> is the number of bytes which make up the string after the comma (,). For example:

OFFTBR #41600,<data...>

4 = number of character to read next for the data length

1600 = One thousand and six hundred bytes of data to read in, represent- ing 200 elements placed one after the other without commas. Each <ele- ment> is made up of 8 bytes; the first four bytes are the Frequency and the second four bytes are the corresponding dB value for the Frequency. For example:

<data_element1><data_element2><data_element3> is equal to: <freq1><dB1><freq2><dB2><freq3><dB3>... is equal to: <4bytes1><4bytes1><4bytes2><4bytes2><4bytes3><4bytes3>

The 4 byte binary values are 4 bytes single precision floating point binary data. The C programming example 'Binary output decoding' on page 6-133shows how to extract the binary data.

OFFTBU	Updates an offset table		SENSOR
	Syntax:	OFFTBU <val>,<bytes>,<binary_data...>
	val:	1 to 5
	bytes:	number of bytes in the binary_data string
	binary_
	data:	frequency and dB offset
	Remarks:	This command updates the offset table specified by <val>. <bytes> is the
		number of bytes in the binary_data string and <binary_data> is a string
		which represents the frequency and the dB offset to apply in the format of:
		<element1><element2><elementn...>, where <elementn> has four bytes

to represent the frequency and four bytes to represent the dB value. The four byte value can be created by multiplying the floating point number by

1024 and converting the LONG number to an ASCII string. For example:

6-62 ML2430A OM