Systems U-28

Question 1

What is HAVEQUICK II and is it secure

Answer 1

An operating mode of the UHF radio
Provides a jam-resistant capability by automatically and continuously changing the freq many times per second.
HQ itself is not secure.

Question 2

What is the net number assignment format of a HQ net

Answer 2

Format is AYY.YZZ
A: Active (antijam)
YY.Y: Net number (hop order)
ZZ: Frequency table (What freqs to use)

Question 3

What function does the TOD play in HQII

Answer 3

Ensures that radios hop frequencies in synchronization

Question 4

What function does the WOD play in HQII

Answer 4

It is a set of coded numbers that determine the following: Hop pattern and Hop rate
This is the CH 20 - 14

Question 5

What does CH 20 of the WOD format

Answer 5

Determines: Type of WOD(training or combat)

Question 6

What does CH 19 of the WOD format

Answer 6

Determines conferencing capability (conferencing: tx/rx 2 player or No conferencing)

Question 7

What do CH 15 - CH 18 of the WOD format mean

Answer 7

They assign the Hopping pattern parameters

Question 8

What are the steps to configure HQII MWOD on a PRC

Answer 8

1. From main page select PGM(key 8)
2. Select HAVEQUICK II CONFIG
3. CONFIG MWOD
4. DEFINE MWOD
5. ENTER DOM
6. SEGMENT 1(CH 20) add numbers from sheet, Do for segment/CH.
7. Clear back to main page

Question 9

What are steps to configure HQII TOD

Answer 9

1. From Main page PGM(8)
2. SYSTEM PRESET
3. System PRESET CONFIG
4. Select HAVEQUICK II as PRESET WAVEFORM
5. HQ NET CONFIG
6. INITAL FREQ, set INITIAL freq. this will be used for TOD rx.
7. Hop Mode Type - Select INIT
8. HQ Net Number - 00.000 to 99.950
9. Receive Only - No

Question 10

How do you receive HQII TOD and switch to HOPPING Mode

Answer 10

1. From main page(HQ II CALL (1))
2. Scroll/select TOD RECEIVE
3. ENTER await rx of TOD
   Clear back to main page
4. Use right arrow to highlight MODE
5. Set to HOP, instead of INIT
6. ENTER

Question 11

What are the NATO frequency bands and where does the military UHF range begin?

Answer 11

HF: 3 MHz - 30 MHz
VHF: 30 MHz - 300 MHz
UHF: 300 - 1000 MHz
L: 1 GHz - 2 GHz
S: 2 GHz - 4 GHz
C: 4 GHz - 8 GHz
X: 8 GHz - 12 GHz
Ku: 12 GHz - 18 GHz
K: 18 GHz - 27 GHz
Ka: 27 GHz - 40 GHz
mm: 40 GHz - 300 GHz

Military UHF range begins at 225 MHz.

Question 12

What are the two different types of GPS signals and how do they apply to the U-28?

Answer 12

SPS & PPS
SPS is used for civilian use and required to be used by the U-28 FMS for FAA purposes.
PPS is used for military use and can decrypt the Y-code. Can be used by all SAASM capable hardware on aircraft. Also has better accuracy than SPS.

Question 13

Explain & compare how ARS works in INAV & ENAV

Answer 13

ARS combines gyro and accelerometer data from M1 IMU with:
EU GPS data in INAV
A blended TAC INS/GPS solution in ENAV

Question 14

What are the SAASM capable receivers on both the EQ/EQ+

Answer 14

EQ: TA-24, PRC 117 #1-4, H-system #1&2, MTS-EU

EQ+: TA-24, PRC 117 #4, H-system #1&2, MTS-EU

Question 15

What is the U-28 frequency range for GPS?

Answer 15

1565 to 1585 MHz (L1) and 1217 to 1237 MHz (L2) [antenna limit]

Question 16

What is the U-28 frequency range for VORTEX C-Band?

Answer 16

RX: 5.0 to 6.0 GHz (antenna limitation)
TX: 4.0 to 6.0 GHz (antenna limitation)

Question 17

What is the U-28 frequency range for VORTEX S-Band?

Answer 17

RX and TX: 2.2 to 2.4 GHz (antenna limitation)

Question 18

EQ and EQ+ have radio differences w/ different hardware. What is the hardware difference and what radio frequencies are affected?

Answer 18

EQ+ uses SSDLs in place of PRC-117 #1, 2, and 3 and ARC-231 #1 & #2. Filter in place in SSDLs between 108 MHz to 137 MHz.

Question 19

What is the U-28 Ku frequency range?

Answer 19

RX: 11.55 to 12.75 GHz (antenna limitation)
TX: 14.0 to 14.5 GHz (antenna limitation)

Question 20

What is the U-28 Ka frequency range?

Answer 20

RX: 19.7 to 21.2 GHz (antenna limitation)
TX: 29.5 to 31.0 GHz (antenna limitation)

Question 21

Given a basic HQ net list how to configure a HAVEQUICK preset, you have the AYY.YZZ where to put it

Answer 21

1. From main page, PGM
2. SYSTEM PRESETS
3. SYSTEM PRESETS CONFIG
4. PRESETS WAVEFORM
5. Now you are configuring the net, so skip: general config,
6. Select HQ NET CONFIG
7. INITIAL FREQ (255.5 for hrt TOD sync)
8. HOP MODE TYPE, select INIT.
9. HQ NET NUMBER, set the AYY.YZZ here
   Go through rest of setup, this is also where you set COMSEC.
   Clear out to main page.