TYT/RETEVIS MONO BAND RADIOS

TYT MD390 (RETEVIS RT3) & TYT MD390 (RETEVIS RT8)

This is the CPS when first open – menu options are on the left and the user input screens are on the right hand side – this is where you will input various data.

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General Settings – This is where you add your call sign, DMR ID, set the VOX (if applicable), back light timer, key pad lock timer, tones and several other options which most people leave as is

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Menu Items – You can decide what menu items you want active in the radio and the hang time which is the time until the radio will close the menu and return to the normal operating screen. Please do not enable the “Radio Disable” option otherwise others could disable your radio. I’ve not known this to happen as yet but it’s just a precaution.

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Button Definitions – Decide on the long press duration as the buttons on the side of the radio can be programmed for two options – one using a short press and another using a long press. Then there are options to utilise one touch access and quick contact access which personally I don’t use then I don’t have to remember what is set where.

Common items to add are (but it’s down to personal choice)

(1) Scan On/Off and Nuisance Delete

(2) Manual Dial for Private and High/Low Power

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Digital Contacts – This is where you add your Group Calls (talk groups) and Private Calls (users). Contact name is what you want to name the talk group and user (usually call sign and name. Call type is to be set as group call or private call – disregard all call – we do not use that function. Call ID is either the talk group number or users DMR ID number. This section can hold 10 000 entries (mixed of talk groups and DMR ID’s). If you are using a version of the Experimental Firmware then it’s not necessary to add the users as this is added as part of the tools and loads into a different part of the radio memory.

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Digital Rx Group Lists – In the terminology I advised how I set them up – here’s the detail – 2 groups – each covering a Phoenix UK time slot’s allocation of talk groups. This is optional however it does make setting the scan list easier and regardless of what talk group you are tuned into, you will hear traffic from the talk groups in the list should they become active. If you are in a region that has access to a “special link” such as TG841, then don’t forget to add it to the RX List.

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Zone Information – Many people have their own way of setting these up based on their personal needs and preferences. I for one have a DV and AV local covering my local digital/analogue repeaters. As I use a version of the experimental firmware, I only have TG9 on each slot per repeater. One option is to have 2 zones for a repeater – one for each slot containing the relevant channels. Also, one for DMR simplex and analogue simplex. Note that the order you create the zones is the order they appear in the radio. You can’t move them using the standard CPS as mentioned under the terminology section.

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Scan list – This is another menu where people prefer to customise according to needs and preferences. The order that these are created is irrelevant. It is however important that you link the channels to the correct scan list as we will see under the channels section. As I use the RX Group Lists I only scan TG9 slot 1 and TG9 slot 2 for DMR repeaters as each are linked to every other talk group on those slots – this allows me to have more DMR repeaters in the scan list. If I didn’t use the RX Group Lists then I’d need to add every talk group into the scan that I want to scan. Note the “Tx Designated Channel” – You can select a specific repeater/talk group, select the channel you were on or select the last channel picked up by the scan.

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Channels Information – This is going to be the longer part as this is where a lot of information is stored. One entry for most items except repeaters. A Phoenix UK repeater carries around 20 talk groups so there will be a channel entry for each one – all with the same information except (1) the talk group it links to (2) which time slot the talk group is on and (3) what RX Group list it links to. This is also why you create the groups and lists before creating the channels as you link them. Don’t forget to set the basics such as channel mode (defines if the channel is analogue or digital), Scan List (from what you created), TOT which is the time out which most people set to 3 minutes, power (you may only need low power if using a hotspot), Admit Criteria (for DMR repeaters) and Rx Only (if you load in PMR446 channel to listen, choosing this option prevents you transmitting on these channels which would be illegal).

The right side is separated into 3 sections

(1) Digital/Analogue Information – common information to both modes such as frequency

(2) Digital Data – DMR specific such as Colour Code, TG, TS (called repeater slot in this CPS), RX List

(3) Analogue Data – CTCSS Tx and Rx tones (whatever is relevant for the repeater)

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If you wish to use CSV files, add a few entries to the contacts (a talk group and DMR ID) and channels (analogue and DMR) then export the data – you can then get an idea of how it’s setup in the CSV file. Not many items need to be completed as the rest stays the same for either analogue or digital. Complete the following:

Name – 16 characters

Mode – 1 for analogue & 2 for DMR

Rx Freq – to 5 decimal places without the decimal point (436.12345 is 43912345)

Tx Freq (As per Rx)

Repeater Slot – Time slot 1 or 2

Colour Code – 1 if analogue

Scan List – your first scan list is 1, 2nd is 2 etc (zero for none)

Contact – same as scan list – the position numbers are in the first column of the contacts screen (TG1 is 1, TG2 is 2, TG8 is 3, TG9 is 4)

Rx Group – same as the scan list/contacts (zero for none)

Rx CTCSS CDCSS – 65535 for digital or zero for analogue (usually only used for Tx)

Tx CTCSS CDCSS – 65535 for digital otherwise follow the table below (zero for none)

The CTCSS tones are represented by a series of 4 digits and not the tone in Hz – below is the table of the codes used for all the CTCSS tones in the radio.

CTCSS

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