Oversky MX VTX-58 PRO HV Series Operating instructions

Manual of MX VTX-58XX PRO HVserial analog video
transmitters
MX VTX-58XX PRO HV serial analog video transmitters are newly designed for FPV flight, it can
satisfy our customers for its optimized multifunction: Support MX-SmartVTX protocol, support manually
timely controlled power (No need to enter set up menu of VTX to change VTX power during flight),
user-friendly installation way etc.
Features:
1) MX-SmartVTX protocol (Note 1);
2) Support PWM signal power control (for timely setting up VTX power manually);
3) LED light indicates VTX power timely;
4) Global commonly used 40CH frequencies;
5) 25MW output (Maximum 800MW, Note 2)
6) Its power will be 25MW when it enters power set up mode;
7) Hole installation position for version A: 30.5*30.5mm (also can be installed on 30.0*30.0mm)
8) Hole installation position for version B:20.0*20.0mm;
Note 1: MX-SmartVTX is a protocol connecting VTX and Flight control board, which is for setting up
working frequency and power on VTX in graphical way.
Note 2: The maximum power output will be different for different version;

Comparison table for 3 versions of video transmitter
VTX-5808 PRO-A HV
VTX-5804 PRO-A HV
VTX-5805 PRO-B HV
Input voltage
7.4~26.0V（2~6S）
Output power
13DBm（25mW）
23DBm（200 mW *）
27DBm（500 mW *）
29DBm（800 mW *）
13DBm（25 mW）
23DBm（200 mW *）
26DBm（400 mW *）
13DBm（25 mW）
23DBm（200 mW *）
27DBm（500 mW *）
Working current(12V)
25 mW：mA
200 mW：mA
500 mW：mA
800 mW：mA
25 mW：mA
200 mW：mA
400 mW：240mA
25 mW：mA
200 mW：mA
500 mW：mA
Working channels
Band A, B, E
Fatshark 8ch
Race Band 8ch
MX-SmartVTX or
SmartAudio protocol
Support
timely manually
power control
Support
Audio input
Not support
Shielding cover
yes
no
Power output
5V/2A
5V/1.5A
Antenna port
SMA
IPEX
size
36.0*36.0*4.8mm
25.6*25.6*4.8mm
Hole distance for
installation
35.0*35.0mm & 30.0*30.0mm
20.0*20.0mm
Hole diameter
Φ3.0mm
Weight(not including
antenna)
6.5g
2.5g
Button Operation:
The button on VTX board has three functions or use ways: set up channel, set up frequency band, set up
VTX power. Connect VTX with power, wait till the LED finishes indicating the present working frequency,
long press the button (SW) 2 seconds, VTX will enter set up menu, two of the LED will show the present
menu state. The exact operation will be as the following:
1）Set up channel(Channel): long press button(SW) for 2 seconds till the blue LED is turned on, then
release the button, entering channel set up mode(red LED flashes one time), select channel by short
pressing the button(SW)----times of the blue LED flashes indicating the current channel value;
2）Set up channel group (Band): long press button(SW) 2 seconds till blue LED light is on, then
release the button(SW), it enters channel set up mode(red LED flashes two times), short press the
button(SW), select channel group(Band)----times of the blue LED flashes indicating the value of
current channel group(Band).
3）Set up transmitting power: long press button(SW) 2 seconds till the blue LED light is on, then
release the button(SW), it enters set up channel mode(red LED flashes 3 times), select power by
short pressing button(SW)---times the blue LED flashes indicating the current value of power.
4）Exit and save: long press the button (SW) 2 seconds till blue ELD is on, then release the

button(SW), after red and blue LED flashes in turn for 5 times, VTX logs out of set up mode, the
changed parameters are saved.
Note: 1) The above operation should only be in 1),2),3),4) order.
2) The transmitting power will be 25mW automatically when VTX enters set up mode, and VTX
will return to the already setup power when VTX exits set up mode.
3) When manually control power function is in use, the power of VTX will follow the manually
controlled power. When manually control power function is not in use, the working power of VTX will
be decided by the setup power of VTX.
Structure of button press menu
SmartAudio Protocol:
SmartAudio protocol is a convenient operation for setting up VTX working frequency and power on

OSD display through radio, it is a solution for connection between VTX and flight control board., which is
very simple and direct way.
For using this function, please connect RXD on VTX to TXD on UART3 or UART6 of flight control
board first, turn on SmartAudio function on flight control board as the following:
Then enter set up mode according to guided message on OSD, and enter set up menu for VTX, VTX
will save the data automatically as soon as the setup is effective(red and blue LED flashes 6 times in turn).

Indication forVTX working frequency and power:
LED flashing state indicates current working frequency when VTX is powered. Circulated flashing blue
LED indicates the current transmitting power of VTX after VTX working frequency is indicated.
●Red and blue LED flashing state indicates the current working frequency of VTX at the time VTX is
powered.
●Circulated flashing blue LED(red LED is solid bright) indicates the current transmitting power of VTX.
LED Indication function:
MX VTX-58XX PRO HV indicates different working state through two color LED lights which is simple
and efficiency. Flashing times of red LED indicates different option, flashing one time indicates Channel,
flashing two times indicates Band, flashing three times indicates power. Flashing times of blue LED
indicates the value of the option.
Red LED
Option:（Channel）, （Band）, VTX power
Blue LED
value of the option
Example: Channel 5, Band B, 500mW power, the LED flashes like the following:
●1x Red & 5x Blue = Channel, 5
●2x Red & 2x Blue = Band, 2 (=B)
●3x Red & 3x Blue = Power, 3 (= 500mW)
Menu table:
Red LED
Blue LED
1*
2*
3*
4*
5*
6*
7*
8*
1*
Channel
1
2
3
4
5
6
7
8
2*
Band
A
B
E
Airwave
Race
3*
Power
25mW
200mW
500mW
800mW
Frequency table:
Channel
1
2
3
4
5
6
7
8
Band A
5865
5845
5825
5805
5785
5765
5745
5725
MHz

Band B
5733
5752
5771
5790
5809
5828
5847
5866
MHz
Band E
5705
5685
5665
5645
5885
5905
5925
5945
MHz
Airwave
5740
5760
5780
5800
5820
5840
5860
5880
MHz
Race
5658
5695
5732
5769
5806
5843
5880
5917
MHz
Power
25mW
200mW
500mW
800mW
（The selections in yellow requires HAM license to operate legally. The video transmitter ensures
that you cannot select illegal channels or power levels by accident:）
Ports description (marked at the back of the board)
Note: A0 gets two functions: GND and PWM, when A0 at the back of the board is connected with GND port,

the manually power control function will be terminated, as a result, A0 functions GND.
Manually power real time control:
Manually power real time control is for adjusting transmitting power of VTX manually according to
distance between transmitter and flying model, through which VTX can be less power consumption and less
interference to other pilots at the scene. Transmitting power of VTX is decided by (button)SW set up or by
the setup value of SmartAudio protocol if manually power control function is not in use.
The manually power control function changes VTX power according to standard servo signal
(1.0~2.0Ms). When signal is added to A0 pin, MCU on VTX changes VTX power accordingly through
checking signal width, blue LED flashing times indicates the current power.
Matchup table between blue LED flashing times and VTX power:
Blue LED
Times
1*
2*
3*
4*
Power
25mW
200mW
500mW
800mW
Matchup table between standard servo signal(1.0~2.0Ms) and VTX power：
VTX-5808 PRO-A HV
VTX-5804 PRO-A HV
VTX-5805 PRO-B HV
Power
Standard servo signal（1.0~2.0mS）
25mW
A0-t<1.2mS
A0-t <1.2mS
A0-t <1.2mS
200mW
1.2 mS < A0-t <1.6mS
A0-t >1.2 mS
1.2 mS < A0-t <1.8mS
500mW
1.6 mS < A0-t <1.8mS
NC
A0-t >1.8 mS
800mW
A0-t >1.8 mS
NC
NC
Note: A0-t indicates the time of high level when standard servo signal inputs A0 port. NC means nothing for
the VTX.
Example for manually power real time control:
Set up one signal channel A on receiver or on flight control board as standard servo signal output mode
( on CLI mode), connect signal A to A0 port on VTX, set up corresponding channel for signal A onto a
3-gear switch on transmitter, when the 3-gear switch on transmitter is pulled, flashing times of the blue LED
will be changed indicating the current transmitting power.
For MX VTX-5808 PRO-A HV with 4 transmitting power options, you can’t use a 3-gear switch for
setting up the value of 4 transmitting power options, customer can set up corresponding channel for signal A
onto a VR potentiometer channel, or set up 2.0ms as the highest value for getting 800Mw(no use for 500mW)
power on the 3-gear switch(the corresponding channel for A) on the transmitter, or set up 1.7ms as the
highest value for getting 500Mw(no use for 800mW) power on the 3-gear switch(the corresponding channel
for A) on the transmitter. Customer can figure out the highest value of transmitting power according to LED
flashing times by pulling 3-gear switch.
Installation:
MX VTX-58XX PRO HV serial video transmitters have mounting holes on the board, customer can
install it by screws for FPV multirotor. Customer can install it by 3M tape on fixed-wing FPV airplane.