Watkins-Johnson Company WJ-8711A, Инструкция по установке, эксплуатации и обслуживанию

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RS-232 REMOTE OPERATION WJ-8711A DIGITAL HF RECEIVER
4-4
Numeric arguments that are used with commands are accepted in a forgiving numeric
representation (nrf). This implies that the WJ-8711A is a forgiving listener. Specific details on numeric
representation are given below.
•
nrf - The nrf (forgiving numeric representation) data element for commands
is composed of the sequential fields listed below. All fields (1-5) are optional
with one restriction: at least one digit must be present with the active data
element of the argument.
Field Data
1 Plus (+) or minus (-) sign.
2 Any number of digits, up to eight.
3 A decimal point (.).
4 Any number of digits, up to eight.
5 An upper-case "E" or lower-case "e"
followed by an optional sign and at least one
digit but no more than two digits.
If the WJ-8711A receives an nrf of a precision greater than it can handle, it
rounds the number rather than truncating it. When rounding, the unit ignores
the sign of the number and rounds up on values greater than or equal to one
half. It rounds down on values less than one half.
•
nr1 - The nr1 is a numeric query response data format for integers,
composed of an optional sign field, followed by any number of digits.
The decimal point is implicitly defined to always follow the last digit
and is therefore, not present in the response data element.
•
nr2 - The nr2 numeric response data format is composed of an
optional sign field, followed by any number of digits, a decimal point,
and any number of digits. At least one digit is always present on both
sides of the decimal point.
4.4
RECEIVER DEVICE MESSAGES
Receiver Device Messages are commands that affect the operational parameters of the
receiver. These commands are listed in
Table 4-1
.
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