2.3.2.V2 (v22) Remote Control
V2 Controller | Firmware Version 2.2.x
The specific Apple Remote functionality described below is applicable to any V2 based LDR preamp that has firmware version 2.2.0 or later. Any V2 based preamp can be upgraded from the earlier 2.1 firmware to version 2.2.
Remote Control Functions
The Apple Remote is a simple 7 button IR remote from which more than only 7 control functions are derived. The control functions of each button will vary depending on whether the preamp is turned on or off and depending on the current control mode of the preamp.
The remote control functions are explained below 3 different ways included visual display, as a list of control functions and as a list of control buttons.[tabgroup_vertical title=””] [tab title=”Display Version”]
In addition to the default volume control mode there are 4 additional control modes that are enabled using the control mode select button. Each these 4 control modes are explained below.
[/tab] [tab title=”Control Function List”]
|Power/Mute||Off||Power/Mute||Pressing button turns the unit on.|
|Power/Mute||On||Power/Mute||Brief press will mute or unmute the unit. The volume will ramp down to zero when muted. When unmuted the volume will ramp back up to its prior setting.
Press/hold of the button will turn the preamp off.
|Volume Adjust||On||Up/Down||Raises and lowers the volume by 1 step for each press. Holding down the buttons will cause the commands to repeat.|
|Balance Adjust||On||Left/Right||Shifts the channel balance 1 step to the left or right. Maximum of 9 steps either way. Each step is slightly less than 1 dB.|
|Input Adjust||On||Mode, Raise/Lower & Left/Right||Pressing Control Mode (play) once will switch the unit into Input Adjust mode. The right display will show the currently selected input number. The left display will show the prior volume level associated with that input when it was last selected.
Music will continue to play on current input channel while while the preamp is in Input Adjust mode.
Use the raise/lower buttons to adjust the input to desired number/source.
Press the Center/Enter button to activate the newly selected input and return to volume control mode.
If you select the same same input as your're currently listening to, nothing happens upon pressing the Enter button and returning to volume control mode.
If you select a new input, pressing the Enter button will cause the existing input signal volume to ramp down, the new input to then be connected, and the new input volume to ramp back up.
Use the left/right buttons to change inputs immediately.
Using the fast mode will change inputs immediately without first muting the volume. The volume will change to the level last associated with the newly selected input.
There will be a brief 200 millisecond delay in fast switching the inputs which will hardly be perceptible.
If you are switching from a low volume to a high volume source you may hear a brief surge in volume of the previous input during the change over. This is normal and due to the fact that we use LDRs as on/off switches and they turn off slowly. Units with regular relays should not experience this volume surge during fast switching.
|Impedance Adjust||On||Mode, Raise/Lower||Pressing Control Mode (play) twice will switch the unit into Impedance Adjust mode. The left display will show the impedance setting number (1 through 5) and the right display will show the impedance level (in xxK ohms) associated with the currently selected impedance setting number.
Use the raise/lower buttons to change the impedance setting number (1-5). Use the left/right buttons to change the impedance level for the currently selected impedance setting. Press the Center/Enter button to exit Impedance Adjust mode and return to volume control.
Changing the impedance setting number will instantly change the preamps impedance to the level associated with the setting number provided that this setting and its associated level have already been run through autocal. If the setting has not been initialized through autocal then selecting it will result in the audio being turned off.
|Display Adjust||On||Mode, Raise/Lower & Left/Right||Pressing Control Mode (play) three (3) times will switch the unit into Display Adjust mode.
The right display will show the brightness level number between 0-15.
Use the raise/lower buttons to change the brightness level. Press the Center/Enter button to exit the Display Adjust mode and return to volume control.
Timeout allows you to cause the display to turn off at the selected number of seconds after prior command input via the remote. Timeout only works when in Volume Adjust Mode and is disabled when the preamp is in any other control mode.
The left display will show the timeout number between 0 and 99 seconds. If set at 0 the display timeout feature is disabled.
Use the left/right buttons to adjust the timeout to desired level. Press the Center/Enter button to exit the Display Adjust mode and return to volume control.
|Max Volume On Input Change Adjust||On||Mode, Raise/Lower||Pressing Control Mode (play) four (4) times will switch the unit into Max Volume On Input Change mode. The left display will be blank. The right display will show the maximum volume allowable when switching to a new input or when the unit is first turned on. This can be adjust between 1 and 70. The initial default value is 35. This protects your audio gear (speakers!) from accidentally going to full volume when switching to an input they may have been at or near full volume when previously selected as would be the case if the preamp was being used in a home theater bypass scenario.
Use the raise/lower buttons to change the max volume on input change level. Press the Center/Enter button to exit the max volume on input change adjust mode and return to volume control.
|Auto-Cal||Off||Enter, Right||Press Enter button to enable auto-calibration. Unit will cycle through each of 4 LDRs showing LDR number in left display and step number in right display. There are 70 calibration steps for each LDR. Upon completion of 4th LDR, unit will shut disable auto-cal and shut off display.
You can skip over an LDR any time during autocal by pressing the right button. If you skip past the 4th LDR, autocal will terminate.
|Pre-Cal||Off||Left, Right||Caution! Do not attempt the Pre-Cal process unless you have both the proper precision resistors and have carefully studied the pre-cal documentation.
Pre-Cal requires the removal of all 4 LDRs and temporarily replacing them with a set of precision resistor modules with both 100 ohm and 100k ohm resistors. Use the 100 ohm resistors first. Also, Pre-Cal requires dual display modules. After the pre-cal resistors are installed, proceed to place the unit into Pre-Cal mode.
First place unit in Auto-Cal mode. Then press the Left button 3 times to switch unit to Pre-Cal mode. When the calibration factor on the display stabilizes, press the Right button to switch to the next LDR/resistor. Repeat for next 3 100 ohm LDR/resistors. Then switch all 4 precision resistors over to 100k. Repeat the process of stabilizing the display value and pressing the Right button four more times. At the conclusion of this process you will have pressed the Right button 8 times. The eight time will end the Pre-Cal process and blank the display. The results of the pre-calibration will be save in memory.
|Enter||Off||Auto-Cal||turns auto-cal on/off|
|On||Volume Adjust||does nothing except blinks display|
|On||Input Adjust||turns on selected input and returns unit to volume control|
|On||Impedance Adjust||returns unit to volume control|
|On||Display Adjust||returns unit to volume control|
|On||Max Volume On Input Change Adjust||returns unit to volume control|
|Raise||Off||Info Display||move info display up 1 step|
|Off||Auto-Cal||press 3 times to enable Pre-Cal Adjust|
|On||Volume Adjust||increase volume 1 step (0-70)|
|On||Input Adjust||select next input (increasing) | rolls over to 1st at max input|
|On||Impedance Adjust||select next impedance setting (1-5) | rolls over at top|
|On||Display Adjust||increase brightness level one step (0-15)|
|On||Max Volume on Input Change Adjust||increase max volume 1 step (1-70)|
|Lower||Off||Info Display||move info display down 1 step|
|On||Volume Adjust||decrease volume 1 step (0-70)|
|On||Input Adjust||select next input (decreasing) | rolls over at bottom|
|On||Impedance Adjust||select next lowest impedance setting (1-5) | rolls over at bottom|
|On||Display Adjust||decrease brightness level one step (0-15)|
|On||Max Volume on Input Change Adjust||decrease max volume 1 step (1-70)|
|Left||Off||Pre-Cal||If unit is in AutoCal, pressing the left button 3 times in a row will put unit into Pre-Cal mode|
|On||Volume Balance Adjust||shifts volume balance 1 step to the left (max 9 steps)|
|On||Input Adjust||switch to next lowest input (fast switch mode)|
|On||Impedance Adjust||increases impedance lvel by 1k|
|Right||Off||Auto-Cal||switches auto-cal to next LDR, shuts off auto-cal if already at 4th LDR|
|Off||Pre-Cal||switches pre-cal to next LDR (required), 1st 4 steps are 100 ohm, 2nd 4 steps are 100k ohm|
|On||Volume Balance Adjust||shifts volume balance 1 step to the right (max 9 steps)|
|On||Input Adjust||switch to the next highest input (fast switching mode)|
|On||Impedance Adjust||increases impedance level by 1k|
|Power||Off||n/a||turns unit on|
|On||n/a||quick press – mutes volume
press/hold - turns unit off
|Mode||On||1st press||selects Input Adjust mode|
|On||2nd press||selects Impedance Adjust mode|
|On||3rd press||selects Display Adjust mode|
|On||4th press||selects Max Volume on Input Change mode|
|On||Additional press||rolls over to 1st position – Input Adjust mode|