Link Communications RLC-6 Manual

4 port link expansion interface

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LINK COMMUNICATIONS

RLC-6

4 PORT LINK EXPANSION INTERFACE

899 Parkway Lane

Billings, MT 59101-4652

(406) 245-5002

V 2.1 June 2, 1993

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Page 1 LINK COMMUNICATIONS RLC-6 4 PORT LINK EXPANSION INTERFACE 899 Parkway Lane Billings, MT 59101-4652 (406) 245-5002 V 2.1 June 2, 1993...
Page 2: Table Of Contents
-- TXIN / CW or Voice Audio Input Adjustment RLC-6 Mode Description -- Define Mode Line Style RLC-6 Linking Mode Descriptions -- Lookup Table Description -- Hub Linking Mode 0 - Mode 7 -- Chain Linking Mode 0 - Mode 7...
Page 3: Cmos Handling Warnings
THE RLC-6 IS BUILT AROUND CMOS DEVICES. CMOS HANDLING PRECAUTIONS MUST BE CONSIDERED TO AVOID DAMAGE DUE TO STATIC ELECTRICITY WHEN HANDLING THE BOARD: BE IN CONTACT WITH GROUND, HANDLE THE BOARD BY ITS EDGES, AND DO NOT TOUCH THE INDIVIDUAL CHIPS WITHOUT BEING DISCHARGED.
Page 4: Theory Of Operation
The RLC-6 link expansion board is controlled by your existing repeater controller. 3 logical output lines are required from that controller for total board control. These 3 lines are used to access the 8 modes that the RLC-6 has programmed into it. When selecting the desired mode of operation, an active low signal is applied to the appropriate control lines.
Page 5: Receiver Cor's
Once you have determined the sense of the incoming COR, you must select the COR sense on the RLC-6. If you have determined that your COR is HIGH going, then move the COR select switch to the "OFF" position. If your COR is LOW going, then move the select switch to the "ON"...
Page 6: Linking Modes
For example (in mode 0), if Link 1 went active, the RLC-6 would PTT Link 2 and route Link 1 audio to Link 2. If while Link 2 is transmitting, Link 2's receiver went active, Link 1's transmitter would begin transmitting the audio coming in Link 2, while its receiver is also active.
Page 7: All Controller Interfacing
0 goes from inactive to active, the RLC-6 changes to mode 1, possibly activating a PTT that would not be active in either Mode 0 or Mode 5. Now the user changes the state of control line 2, putting the RLC-6 into mode 5.
Page 8: Jp1 Audio Test Point Pinouts
If no audio is seen at JP1, then check and see if the Main RX COR is selected. If there is not a valid COR seen by the RLC-6, there will not be audio present at JP1.
Page 9: Transmitter Audio Output Impedance Selection
The TXIN audio input is usually connected to the main transmitter audio bus; you may not use it at all. It can be used to send CW or voice messages down the linking system. Once the RLC-6 is properly adjusted you can adjust the TXIN level.
Page 10: Rlc-6 Mode Description
L - Low Voltage (0V) or a grounded pin The RLC-6 internally pulls up the 3 logical control lines with a 10K resistor. Therefore it is not required that the user connect any unused lines to +5 V. In order to take a control line low, the user must apply a ground, a logical "LOW", to the appropriate pin.
Page 11: Rlc-6 Linking Mode Descriptions
The RLC-6 takes many factors into account when determining how to route audio and activate PTT lines. One of these factors is whether you have selected the hub or chain linking mode (with a dip switch on the RLC-6 board).
Page 12 Inputs" represent the 16 different combinations of the four COR inputs that could be active at any one time. One way to think of the first row is, "If none of the ports are keyed up, what do I want the RLC-6 to do?" The second row shows an 'x' in column three under "Active COR Inputs,"...
Page 13 Hub/Voted combination. Note: Port 0 is the main port. Also note that whenever an audio output has been selected (in the middle four columns), the corresponding PTT is always active (this is enforced by the RLC-6 Mode Editor).
Page 14 Whenever link 2 is keyed up, it goes out main. Whenever main is keyed up it goes out link 2. The other links are ignored. Copyright 1993 Link Communications...
Page 15 Whenever link 1 is keyed up, it goes out main. If link 2 is keyed up and link 1 is not (if it is not out-voted), link 2 goes out main. Whenever main is keyed up it goes out both connected links. Copyright 1993 Link Communications...
Page 16 Whenever link 2 is keyed up, it goes out main. If link 3 is keyed up and link 2 is not (if it is not out-voted), link 3 goes out main. Whenever main is keyed up it goes out both connected links. Copyright 1993 Link Communications...
Page 17 Since we are in hub mode, the ports never talk to each other, so the only audio then ever need is from the main port. Main carries mixed audio whenever more than one link is keyed up. Copyright 1993 Link Communications...
Page 18 Mode: 2 Active COR Inputs Audio Output Connected To Active PTT link2 link2 link2 link2 main main link2 main link2 main main main link2 main link2 main See notes on mode 1. Copyright 1993 Link Communications...
Page 19 Link 3 could be muted for every combination of active COR signals and everything would work exactly the same way, but we chose to use mute only where needed to make its purpose more clear. Copyright 1993 Link Communications...
Page 20 Whenever both link 2 and link 3 are active, they are mixed and sent out main. Whenever main is keyed up, it goes out both link 2 and link 3. Mute is used for the same reasons discussed for Mode 4 above. Copyright 1993 Link Communications...
Page 21 Because voted audio is selected, main takes the highest priority link that is keyed up. Each of the links carry the highest priority audio source other than itself. No port ever gets its own audio back. Copyright 1993 Link Communications...
Page 22 1. The same applies to modes 2 and 3. Mode: 2 Active COR Inputs Audio Output Connected To Active PTT link2 link2 link2 link2 main main link2 main link2 main main main link2 main link2 main See note on mode 1 above. Copyright 1993 Link Communications...
Page 23 Main gets audio from link 1 if it is keyed up, otherwise it tries link 2 - normal voting. Links 1 and 2 carry main audio if main is keyed up, otherwise they are cross connected. Modes 5 and 6 are similar. Copyright 1993 Link Communications...
Page 25 If more than one link is keyed, main carries mixed audio. If main is keyed as well, this mixed audio will contain main's own audio. In the case that all ports are keyed up simultaneously, they all need audio from the other three ports, so they all carry mixed audio. Copyright 1993 Link Communications...
Page 26 Once again we see that modes 1, 2 and 3 are identical regardless of the audio and linking modes. Mode: 2 Active COR Inputs Audio Output Connected To Active PTT link2 link2 link2 link2 main main link2 main link2 main main main link2 main link2 main Copyright 1993 Link Communications...
Page 27 The same argument can be made for each of the connected links. Modes 5 and 6 are similar; they just disconnect a different link port. Link port 3 is muted whenever it is keyed up and any other port carries mixed audio to keep it from getting into the mixed audio. Copyright 1993 Link Communications...
Page 28 Active PTT link3 link3 link2 link2 link3 link2 link3 link3 link2 link2 mute link3 link2 main main link3 main link2 main main main link3 mute main link2 mute main mute See note on mode 4 above. Copyright 1993 Link Communications...
Page 29 Stated another way, if main and two or three links are all keyed simultaneously, main port audio will go out as part of the mixed signal on at least one of the links. Copyright 1993 Link Communications...
Page 30: Troubleshooting
- Is the audio connected to the transmitter? - Is the audio out impedance strapped correctly? NO CONTROL OVER THE RLC-6 MODES, OR THE MODES ARE DIFFERENT - Are the three control lines connected? - Do the lines go to ground (Low) when active?
Page 31 RLC-6 REPEATER LINK CONTROLLER PARTS LIST Revision: 2 Item Quantity Reference Part ______________________________________________________ C1,C2,C3,C4 4.7uF C5,C6,C7,C8,C9,C10,C11 C12,C13,C14,C23,C28 C15,C16,C17,C18,C24,C25, 100pF C26,C27,C29 100uF 1N914 6 PIN HEAD/F 2 HEAD/JUMPER 25 PIN RA/F 25/25 EDGE 10/10 HEADER Q1,Q2,Q3,Q4,Q9 2N7000 Q5,Q6,Q7,Q8 2N3904 R1,R2,R3,R4 2.2K...
Page 32: Rlc-6 P2 Pin-Out
RLC-6 REPEATER LINK CONTROLLER PARTS LIST Revision: 2 Item Quantity Reference Part ______________________________________________________ U1,U2 2732A-45 U3,U4,U5,U6 4051 74HC123A LM7805 LM317 U15,U17 74HC08 4066 74HC86 74HC02 U20,U21,U22 LM324 U1,U2 24 PIN SOCKET U3,4,5,6,9 16 PIN SOCKET U15,16,17,18,20,21,22 14 PIN SOCKET Copyright 1993 Link Communications...
Page 33: Board Layouts
RLC-6 LINK CONTROLLER EDGE CARD CONNECTION: LINK 1 AUDIO IN AUDIO OUT PTT (ACTIVE LOW) LINK 2 AUDIO IN AUDIO OUT PTT (ACTIVE LOW) LINK 3 AUDIO IN AUDIO OUT PTT (ACTIVE LOW) MAIN AUDIO IN AUDIO OUT PTT (ACTIVE LOW)
Page 34: Schematics
RLC-6 LED DISPLAY MODULE RLC-6 LINK1 CONTROL USER MODES LINK2 G O (1) R O (1) R O (H/C) LINK3 G O (2) R O (2) R O (V/M) MAIN G O (3) R O (3) LED Side View R - RED LED...