Fillable Dd Form 1494 Application For Equipment Frequency Allocation (Page 2 of 2) in pdf

INSTRUCTIONS FOR COMPLETING DD FORM 1494,

"APPLICATION FOR EQUIPMENT FREQUENCY ALLOCATION"

RECEIVER EQUIPMENT CHARACTERISTICS PAGE

ITEM 11 - RF Selectivity. Enter the bandwidth at the -3, -20 and

ITEM 1 - Nomenclature, Manufacturer’s Model No. Enter the

-60 dB levels. The RF bandwidth includes any significant

Government assigned alphanumeric equipment designation. If

attenuation contributed by filtering in the input circuit or

above is not available, enter the manufacturer’s model number,

transmission line. Values of RF bandwidths specified should be

e.g., MIT 502, and complete Item 2. If above is not available, enter

indicated as calculated or measured by marking the appropriate

a short descriptive title, e.g., GPS Receiver, Director Station RX.

block. Indicate units, e.g., kHz or MHz. Enter the preselection

type, e.g., tunable cavity.

ITEM 2 - Manufacturer’s Name. Enter the manufacturer’s name if

available. If a manufacturer’s model number is listed in Item 1, this

ITEM 12 - IF Frequency. Enter the tuned frequency of the first,

item must be completed.

second and third IF stages. Indicate units, e.g., kHz or MHz.

ITEM 13 - Maximum Post Detection Frequency. Enter the

ITEM 3 - Receiver Installation. List specific type(s) of vehicle(s),

maximum post detection frequency. This is the nominal frequency

ship(s), plane(s) or building(s), etc., where the receiver(s) will be

at the -3 dB point on the high frequency side of the receiver base

installed.

band. Indicate units, e.g., kHz or MHz.

ITEM 4 - Receiver Type. Enter the generic class, e.g., Dual

ITEM 14 - Minimum Post Detection Frequency. For multichannel

Conversion Superheterodyne or Homodyne.

FM systems enter the minimum post detection frequency. This is

the nominal frequency at the -3 dB point on the low frequency side

ITEM 5 - Tuning Range. Enter the frequency range through which

of the receiver base band. Indicate units, e.g., kHz or MHz.

the receiver is capable of being tuned, e.g., 225-400 MHz. For

ITEM 15 - Oscillator Tuned. Mark the appropriate block to indicate

equipment designed to operate only at a single frequency, enter this

the location of the 1st, 2nd and 3rd oscillator frequencies with

frequency. Indicate units, e.g., kHz, MHz or GHz.

respect to the associated mixer input signal.

ITEM 6 - Method of Tuning. Enter the method of tuning, e.g.,

ITEM 16 - Maximum Bit Rate. Where applicable, enter the

crystal, synthesizer or cavity. If the equipment is not readily tunable

maximum bit rate (bps) that can be used. If spread spectrum is

in the field, indicate in Item 21, "Remarks," the complexity of tuning.

used, enter the bit rate after encoding. Describe any error

Include complexity factors such as skill levels involved, major

detecting/correcting codes in Item 21, "Remarks."

assemblies involved, time required, and location (factory or depot)

ITEM 17 - Sensitivity.

where equipment is to be tuned.

a. Enter the sensitivity in dBm.

ITEM 7 - RF Channeling Capability. Describe the RF channeling

capability. For uniformly spaced channels, enter the center

b. Specify criteria used, e.g., 12 dB SINAD (Signal to Interference

frequency of the first channel and channel spacing e.g., first

plus Noise and Distortion).

channel 406 MHz, 100 kHz increments; for continuous tuning, enter

the lowest frequency and the word "continuous;" for others,

c. If the receiver is used with terrestrial systems, enter the receiver

including cases where channel selection is under software control,

noise figure in dB.

enter a detailed description in Item 21, "Remarks."

d. If the receiver is used with space or satellite earth stations, enter

the receiver noise temperature in Kelvin.

ITEM 8 - Emission Designator(s). Enter the emission

designator(s) including the necessary bandwidth(s) for each

ITEM 18 - De-emphasis. For frequency or phase modulated

designator, e.g., 16K0F3E. For systems with a frequency hopping

receivers mark the appropriate block to indicate whether

mode as well as a non-hopping mode enter the emission

de-emphasis is available.

designators for each mode.

ITEM 19 - Image Rejection. Enter the image rejection in dB.

ITEM 9 - Frequency Tolerance. Enter the frequency tolerance,

Image rejection is the ratio of the image frequency signal level

i.e., the maximum departure of a receiver from its assigned

required to produce a specified output, to the desired signal level

frequency after normal warm-up time has been allowed. Indicate

required to produce the same output.

the units in parts per million (ppm) for all emission types except

ITEM 20 - Spurious Rejection. Enter the spurious rejection in dB.

single sideband which shall be indicated in Hertz (Hz).

Enter the single level of spurious rejection that the receiver meets

or exceeds at all frequencies outside the -60 dB IF bandwidth.

ITEM 10 - IF Selectivity. Enter the bandwidth for each IF stage at

Spurious rejection is the ratio of a particular out-of-band frequency

the -3, -20 and -60 dB levels. Indicate units, e.g., kHz or MHz.

signal level required to produce a specified output, to the desired

signal level required to produce the same output.

DD FORM 1494, AUG 96

Receiver Equipment Characteristics Page (Back)

Dd Form 1494 Application For Equipment Frequency Allocation Page 2

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