## Frequency (FR)

Purpose: To specify the frequency(s) in megahertz
**Card:**

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/2| 5| 10| 15| 20| 30| 40| 50| 60| 70| 80|
/ | | | | | | | | | | |
| | | | | | | | | | | |
|FR |I1 | I2 | I3 | I4 | F1 | F2 | F3 | F4 | F5 | F6 |
| | | | | | | | | | | |
| | I | N | B | B | FMHZ |DELFRQ|BLANK |BLANK |BLANK |BLANK |
| | F | F | L | L | | | | | | |
| | R | R | A | A | | | | | | |
| | Q | Q | N | N | | | | | | |
| | | | K | K | | | | | | |
| | | | | | | | | | | |
| The numbers along the top refer to the last column in each field |
| | | | | | | | | | | |

**Parameters:**
**Integers**
__IFRQ (I1)__ - Determlnes the type of frequency stepping which is
- O - linear stepping.
- 1 - multiplicative stepping.

__NFRQ (12)__ - Sumber of frequency steps. If this field is blank, one is assumed.
__(I3)__ & __(I4)__ - Blank.

**Floating Point**
__FMHZ (F1)__ - Frequency in megahertz.
__DELFRQ (F2)__ - frequency stepping increment. If the frequency stepping
is linear, this quantity is ailed to the frequency each tlme. If the
stepping is multiplicatlve, this is the multiplication factor.
__(F3)__ -> __(F6)__ - Blank.

__Notes:__
- If a frequency card toes not appear in the data deck, a single frequency
of 299.8 MHz is assumed. Since the wavelength at 299.8 MHz 1s one
meter, the geometry Is in units of wavelengths for this case.

- Frequency cards may not be grouped together. If they are, only the
information on the last card in the group will be used.

- After an FR cart with NFRQ greater than 1, an NE or SH card will not
initiate execution while an RP or XQ card wlll. In this case, only one
NE or WH cart and one RP card will bc effective for the multiple
frequencies.

- After a frequency loop for NFRQ greater than one has been completed, it
will not be repeated for a second execution request. The FR card must
be repeated in this case.

*This file was last modified on *